Document:

<PAGE>
                                                                     Exhibit 4.1
                              MESA AIR GROUP, INC.

                                       AND

               THE GUARANTORS NAMED ON THE SIGNATURE PAGES HERETO

                                       AND

                         U.S. BANK NATIONAL ASSOCIATION

                                     TRUSTEE

                            Senior Convertible Notes
                                    due 2023

                                    INDENTURE

                            Dated as of June 16, 2003

<PAGE>
                             CROSS-REFERENCE TABLE*
<TABLE>
<CAPTION>
TIA SECTION                                                          INDENTURE SECTION
<S>                                                                  <C>
310(a)(1).....................................................       7.10
   (a)(2).....................................................       7.10
   (a)(3).....................................................       N.A.
   (a)(4).....................................................       N.A.
   (b)........................................................       7.08; 7.10
   (c)........................................................       N.A.
311(a)                                                               7.11
   (b)........................................................       7.11
   (c)........................................................       N.A.
312(a)                                                               2.05
   (b)........................................................       14.03
   (c)........................................................       14.03
313(a)                                                               7.06
   (b)(1).....................................................       N.A.
   (b)(2).....................................................       7.06
   (c)........................................................       14.02
   (d)........................................................       7.06
314(a)                                                               4.02; 4.03; 14.02
   (b)........................................................       N.A.
   (c)(1).....................................................       14.04
   (c)(2).....................................................       14.04
   (c)(3).....................................................       N.A.
   (d)........................................................       N.A.
   (e)........................................................       14.05
   (f)........................................................       N.A.
315(a)                                                               7.01
   (b)........................................................       7.05; 14.02
   (c)........................................................       7.01
   (d)........................................................       7.01
   (e)........................................................       6.11
316(a) (last sentence)........................................       2.08
   (a)(1)(A)..................................................       6.05
   (a)(1)(B)..................................................       6.04
   (a)(2).....................................................       N.A.
   (b)........................................................       6.07
317(a)(1).....................................................       6.08
   (a)(2).....................................................       6.09
   (b)........................................................       2.04
318(a)                                                               14.01
</TABLE>

----------
N.A. means Not Applicable.

Note: This Cross-Reference Table shall not, for any purpose, be deemed to be a
      part of the Indenture.

<PAGE>
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                                               PAGE
                                                                                               ----
<S>                  <C>                                                                       <C>
                                            ARTICLE 1

                           DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01         Definitions .........................................................        1
SECTION 1.02         Other Definitions ...................................................        7
SECTION 1.03         Incorporation by Reference of Trust Indenture Act ...................        8
SECTION 1.04         Rules of Construction ...............................................        8
SECTION 1.05         Acts of Holders .....................................................        9

                                            ARTICLE 2

                                         THE SECURITIES

SECTION 2.01         Form and Dating .....................................................       10
SECTION 2.02         Execution and Authentication ........................................       12
SECTION 2.03         Registrar, Paying Agent and Conversion Agent ........................       13
SECTION 2.04         Paying Agent to Hold Money and Securities in Trust ..................       13
SECTION 2.05         Securityholder Lists ................................................       14
SECTION 2.06         Transfer and Exchange ...............................................       14
SECTION 2.07         Replacement Securities ..............................................       16
SECTION 2.08         Outstanding Securities; Determinations of Holders' Action ...........       16
SECTION 2.09         Temporary Securities ................................................       17
SECTION 2.10         Cancellation ........................................................       17
SECTION 2.11         Persons Deemed Owners ...............................................       18
SECTION 2.12         Global Securities ...................................................       18
SECTION 2.13         CUSIP Numbers .......................................................       23

                                            ARTICLE 3

                                   REDEMPTION AND PURCHASES

SECTION 3.01         Right to Redeem; Notices to Trustee .................................       23
SECTION 3.02         Selection of Securities to Be Redeemed ..............................       23
SECTION 3.03         Notice of Redemption ................................................       24
SECTION 3.04         Effect of Notice of Redemption ......................................       25
SECTION 3.05         Deposit of Redemption Price .........................................       25
SECTION 3.06         Securities Redeemed in Part .........................................       25
SECTION 3.07         Conversion Arrangement on Call for Redemption .......................       25
SECTION 3.08         Purchase of Securities at Option of the Holder ......................       26
SECTION 3.09         Purchase of Securities at Option of the Holder upon Change in Control       33
</TABLE>

                                      -i-
<PAGE>
<TABLE>
<CAPTION>

                                                                                               PAGE
                                                                                               ----
<S>                  <C>                                                                       <C>
SECTION 3.10         Effect of Purchase Notice or Change in Control Purchase Notice ......       36
SECTION 3.11         Deposit of Purchase Price or Change in Control Purchase Price .......       37
SECTION 3.12         Securities Purchased in Part ........................................       37
SECTION 3.13         Repayment to the Company ............................................       38

                                            ARTICLE 4

                                            COVENANTS

SECTION 4.01         Payment of Securities ...............................................       38
SECTION 4.02         SEC and Other Reports ...............................................       38
SECTION 4.03         Compliance Certificate ..............................................       39
SECTION 4.04         Further Instruments and Acts ........................................       39
SECTION 4.05         Maintenance of Office or Agency .....................................       39
SECTION 4.06         Delivery of Certain Information .....................................       40
SECTION 4.07         Limitation on Guarantees of Indebtedness by Subsidiaries ............       40
SECTION 4.08         Covenant to Comply with Securities Laws upon Purchase of Securities .       40

                                            ARTICLE 5

                                      SUCCESSOR CORPORATION

SECTION 5.01         When Company May Merge or Transfer Assets ...........................       40

                                            ARTICLE 6

                                      DEFAULTS AND REMEDIES

SECTION 6.01         Events of Default ...................................................       42
SECTION 6.02         Acceleration ........................................................       44
SECTION 6.03         Other Remedies ......................................................       44
SECTION 6.04         Waiver of Past Defaults .............................................       44
SECTION 6.05         Control by Majority .................................................       45
SECTION 6.06         Limitation on Suits .................................................       45
SECTION 6.07         Rights of Holders to Receive Payment ................................       45
SECTION 6.08         Collection Suit by Trustee ..........................................       46
SECTION 6.09         Trustee May File Proofs of Claim ....................................       46
SECTION 6.10         Priorities ..........................................................       47
SECTION 6.11         Undertaking for Costs ...............................................       47
SECTION 6.12         Waiver of Stay, Extension or Usury Laws .............................       47
</TABLE>

                                      -ii-
<PAGE>
<TABLE>
<CAPTION>

                                                                                               PAGE
                                                                                               ----
<S>                  <C>                                                                       <C>
                                            ARTICLE 7

                                             TRUSTEE

SECTION 7.01         Duties of Trustee ...................................................       48
SECTION 7.02         Rights of Trustee ...................................................       49
SECTION 7.03         Individual Rights of Trustee ........................................       51
SECTION 7.04         Trustee's Disclaimer ................................................       51
SECTION 7.05         Notice of Defaults ..................................................       51
SECTION 7.06         Reports by Trustee to Holders .......................................       51
SECTION 7.07         Compensation and Indemnity ..........................................       51
SECTION 7.08         Replacement of Trustee ..............................................       52
SECTION 7.09         Successor Trustee by Merger .........................................       53
SECTION 7.10         Eligibility; Disqualification .......................................       53
SECTION 7.11         Preferential Collection of Claims Against Company ...................       53

                                            ARTICLE 8

                                     DISCHARGE OF INDENTURE

SECTION 8.01         Discharge of Liability on Securities ................................       54
SECTION 8.02         Repayment to the Company ............................................       54

                                            ARTICLE 9

                                            AMENDMENTS

SECTION 9.01         Without Consent of Holders ..........................................       54
SECTION 9.02         With Consent of Holders .............................................       55
SECTION 9.03         Compliance with Trust Indenture Act .................................       56
SECTION 9.04         Revocation and Effect of Consents, Waivers and Actions ..............       56
SECTION 9.05         Notation on or Exchange of Securities ...............................       56
SECTION 9.06         Trustee to Sign Supplemental Indentures .............................       56
SECTION 9.07         Effect of Supplemental Indentures ...................................       57

                                            ARTICLE 10

                                    SPECIAL TAX EVENT CONVERSION

SECTION 10.01        Optional Conversion to Semiannual Coupon Note upon Tax Event ........       57
</TABLE>

                                      -iii-
<PAGE>
<TABLE>
<CAPTION>

                                                                                               PAGE
                                                                                               ----
<S>                  <C>                                                                       <C>
                                            ARTICLE 11

                                            CONVERSION

SECTION 11.01        Conversion Privilege ................................................       57
SECTION 11.02        Conversion Procedure ................................................       58
SECTION 11.03        Fractional Shares ...................................................       59
SECTION 11.04        Taxes on Conversion .................................................       59
SECTION 11.05        Company to Provide Stock ............................................       60
SECTION 11.06        Adjustment for Change in Capital Stock ..............................       60
SECTION 11.07        Adjustment for Rights Issue .........................................       61
SECTION 11.08        Adjustment for Other Distributions ..................................       62
SECTION 11.09        When Adjustment May Be Deferred .....................................       63
SECTION 11.10        When No Adjustment Required .........................................       64
SECTION 11.11        Notice of Adjustment ................................................       64
SECTION 11.12        Voluntary Increase ..................................................       64
SECTION 11.13        Notice of Certain Transactions ......................................       65
SECTION 11.14        Reorganization of Company; Special Distributions ....................       65
SECTION 11.15        Company Determination Final .........................................       66
SECTION 11.16        Trustee's Adjustment Disclaimer .....................................       66
SECTION 11.17        Simultaneous Adjustments ............................................       66
SECTION 11.18        Successive Adjustments ..............................................       66
SECTION 11.19        Rights Issued in Respect of Common Stock Issued upon Conversion .....       66
SECTION 11.20        Company's Right to Elect to Pay Cash or Common Stock ................       67

                                            ARTICLE 12

                                       PAYMENT OF INTEREST

SECTION 12.01        Interest Payments ...................................................       67
SECTION 12.02        Defaulted Interest ..................................................       68
SECTION 12.03        Interest Rights Preserved ...........................................       69

                                            ARTICLE 13

                                            GUARANTEES

SECTION 13.01        Guarantees ..........................................................       69
SECTION 13.02        Severability ........................................................       70
SECTION 13.03        Future Subsidiaries .................................................       71
SECTION 13.04        Priority of Guarantees ..............................................       71
SECTION 13.05        Limitation of Guarantors' Liability .................................       71
SECTION 13.06        Subrogation .........................................................       71
SECTION 13.07        Reinstatement .......................................................       72
</TABLE>

                                      -iv-
<PAGE>
<TABLE>
<CAPTION>

                                                                                               PAGE
                                                                                               ----
<S>                  <C>                                                                       <C>
SECTION 13.08        Release of the Guarantor ............................................       72
SECTION 13.09        Benefits Acknowledged ...............................................       72

                                            ARTICLE 14

                                           MISCELLANEOUS

SECTION 14.01        Trust Indenture Act Controls ........................................       72
SECTION 14.02        Notices .............................................................       72
SECTION 14.03        Communication by Holders with Other Holders .........................       74
SECTION 14.04        Certificate and Opinion as to Conditions Precedent ..................       74
SECTION 14.05        Statements Required in Certificate or Opinion .......................       74
SECTION 14.06        Separability Clause .................................................       74
SECTION 14.07        Rules by Trustee, Paying Agent, Conversion Agent and Registrar ......       74
SECTION 14.08        Calculations ........................................................       75
SECTION 14.09        Legal Holidays ......................................................       75
SECTION 14.10        Governing Law .......................................................       75
SECTION 14.11        No Recourse Against Others ..........................................       75
SECTION 14.12        Successors ..........................................................       75
SECTION 14.13        Multiple Originals ..................................................       75
</TABLE>

                                       -v-
<PAGE>

            INDENTURE dated as of June 16, 2003 among MESA AIR GROUP, INC., a
Nevada corporation ("Company"), the guarantors executing a signature page hereto
(each a "Guarantor" and collectively, the "Guarantors") and U.S. BANK NATIONAL
ASSOCIATION, a national banking association (the "Trustee").

                             RECITALS OF THE COMPANY

            The Company has duly authorized the creation of an issue of Senior
Convertible Notes due 2023 (the "Securities") having the terms, tenor, amount
and other provisions hereinafter set forth, and, to provide therefor, the
Company has duly authorized the execution and delivery of this Indenture.

            All things necessary to make the Securities, when the Securities are
duly executed by the Company and the Guarantors and authenticated and delivered
hereunder and duly issued by the Company and the Guarantors, the valid
obligations of the Company and the Guarantors, and to make this Indenture a
valid and binding agreement of the Company and the Guarantors, in accordance
with their and its terms, have been done.

                   NOW, THEREFORE, THIS INDENTURE WITNESSETH:

            For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:

                                   ARTICLE 1

                   DEFINITIONS AND INCORPORATION BY REFERENCE

            SECTION 1.01 Definitions.

            "144A Global Security" means a permanent Global Security in the form
of the Security attached hereto as Exhibit A-1, and that is deposited with and
registered in the name of the Depositary, representing Securities sold in
reliance on Rule 144A under the Securities Act.

            "Affiliate" of any specified person means any other person directly
or indirectly controlling or controlled by or under direct or indirect common
control with such specified person. For the purposes of this definition,
"control" when used with respect to any specified person means the power to
direct or cause the direction of the management and policies of such person,
directly or indirectly, whether through the ownership of voting securities, by
contract or otherwise; and the terms "controlling" and "controlled" have
meanings correlative to the foregoing.

            "Applicable Procedures" means, with respect to any transfer or
transaction involving a Global Security or beneficial interest therein, the
rules and procedures of the Depositary
<PAGE>
                                      -2-

for such Security, in each case to the extent applicable to such transaction and
as in effect from time to time.

            "Average Sale Price" means the average of the Sale Prices of the
Common Stock for the shortest of

            (i) 30 consecutive trading days ending on the last full trading day
      prior to the Time of Determination with respect to the rights, warrants or
      options or distribution in respect of which the Average Sale Price is
      being calculated, or

            (ii) the period (x) commencing on the date next succeeding the first
      public announcement of (a) the issuance of rights, warrants or options or
      (b) the distribution, in each case, in respect of which the Average Sale
      Price is being calculated and (y) proceeding through the last full trading
      day prior to the Time of Determination with respect to the rights,
      warrants or options or distribution in respect of which the Average Sale
      Price is being calculated (excluding days within such period, if any,
      which are not trading days), or

            (iii) the period, if any, (x) commencing on the date next succeeding
      the Ex-Dividend Time with respect to the next preceding (a) issuance of
      rights, warrants or options or (b) distribution, in each case, for which
      an adjustment is required by the provisions of Sections 11.06(c), 11.07 or
      11.08 and (y) proceeding through the last full trading day prior to the
      Time of Determination with respect to the rights, warrants or options or
      distribution in respect of which the Average Sale Price is being
      calculated (excluding days within such period, if any, which are not
      trading days).

            "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of such board.

            "Business Day" means each day of the year other than a Saturday or a
Sunday or other day on which banking institutions in The City of New York or the
city in which the Corporate Trust Office is located are required or authorized
to close.

            "Capital Stock" for any corporation means any and all shares,
interests, rights to purchase, warrants, options, participations or other
equivalents of or interests in (however designated) stock or other equity issued
by that corporation.

            "Certificated Securities" means any of the Securities that are in
the form of the Security attached hereto as Exhibit A-3.

            "Common Stock" shall mean the shares of Common Stock, no par value,
of the Company as it exists on the date of this Indenture or any other shares of
Capital Stock of the Company into which the Common Stock shall be reclassified
or changed.
<PAGE>
                                      -3-

            "Company" means the party named as the "Company" in the first
paragraph of this Indenture until a successor replaces it pursuant to the
applicable provisions of this Indenture and, thereafter, shall mean such
successor. The foregoing sentence shall likewise apply to any subsequent such
successor or successors.

            "Company Request" or "Company Order" means a written request or
order signed in the name of the Company by any two Officers.

            "Corporate Trust Office" means an office of the Trustee at which at
any time its corporate trust business shall be administered, which office at the
date hereof is located at One Federal Street, Boston, Massachusetts 02110, or
such other address as the Trustee may designate from time to time by notice to
the Company, or the principal corporate trust office of any successor Trustee
(or such other address as a successor Trustee may designate from time to time by
notice to the Company).

            "Debt" means with respect to the Company at any date, without
duplication, obligations (other than nonrecourse obligations) for borrowed money
or evidenced by bonds, debentures, notes or similar instruments.

            "Default" means any event which is, or after notice or passage of
time or both would be, an Event of Default.

            "domestic Subsidiary" means any Subsidiary that was formed under the
laws of the United States or any state or political subdivision thereof or the
District of Columbia.

            "Global Securities" means any of the Securities that are in the form
of the Security attached hereto as Exhibit A-1, and to the extent that such
Securities are required to bear the Legend required by Section 2.06, such
Securities will be in the form of a 144A Global Security.

            "guarantee" means, as applied to any obligation, (i) a guarantee
(other than by endorsement of negotiable instruments for collection in the
ordinary course of business), direct or indirect, in any manner, of any part or
all of such obligation and (ii) an agreement, direct or indirect, contingent or
otherwise, the practical effect of which is to assure in any way the payment or
performance (or payment of damages in the event of non-performance) of all or
any part of such obligation, including, without limiting the foregoing, the
payment of amounts drawn down by letters of credit.

            "Guarantee" means any guarantee of the Securities by any Subsidiary
in accordance with the provisions of Article 13.

            "Guarantors" means (i) each Subsidiary listed as a signatory to this
Indenture and (ii) each Person who becomes a Guarantor pursuant to Article 13
and/or Section 4.07 of this Indenture.
<PAGE>
                                      -4-

            "Holder" or "Securityholder" means a person in whose name a Security
is registered on the Registrar's books.

            "Indenture" means this Indenture, as amended or supplemented from
time to time in accordance with the terms hereof, including the provisions of
the TIA that are deemed to be a part hereof.

            "Institutional Accredited Investor Security" means a Security in the
form of the Security attached hereto as Exhibit A-3, representing Securities
sold to Institutional Accredited Investors.

            "Issue Date" of any Security means the date on which the Security
was originally issued or deemed issued as set forth on the face of the
Security.

            "Issue Price" of any Security means, in connection with the original
issuance of such Security, the initial issue price at which the Security is sold
as set forth on the face of the Security.

            "Officer" means the Chairman of the Board, the Vice Chairman, the
Chief Executive Officer, the President, any Executive Vice President, any Senior
Vice President, any Vice President, the Treasurer or the Secretary or any
Assistant Treasurer or Assistant Secretary of the Company.

            "Officers' Certificate" means a written certificate containing the
information specified in Sections 14.04 and 14.05, signed in the name of the
Company by any two Officers, and delivered to the Trustee. An Officers'
Certificate given pursuant to Section 4.03 shall be signed by the principal
executive financial or accounting Officer of the Company but need not contain
the information specified in Sections 14.04 and 14.05.

            "Opinion of Counsel" means a written opinion containing the
information specified in Sections 14.04 and 14.05, from legal counsel who is
acceptable to the Trustee. The counsel may be an employee of, or counsel to, the
Company or the Trustee.

            "Original Issue Discount" of any Security means the difference
between the Issue Price and the Principal Amount at Maturity of the Security as
set forth on the face of the Security, which shall accrue as set forth in the
form of Security.

            "person" or "Person" means any individual, corporation, limited
liability company, partnership, joint venture, association, joint-stock company,
trust, unincorporated organization, or government or any agency or political
subdivision thereof.

            "Principal Amount at Maturity" of a Security means the principal
amount at maturity as set forth on the face of the Security.
<PAGE>
                                       -5-

            "Redemption Date" or "redemption date" means the date specified for
redemption of the Securities in accordance with the terms of the Securities and
this Indenture.

            "Redemption Price" or "redemption price" shall have the meaning set
forth in paragraph 5 of the Securities.

            "Responsible Officer" means, when used with respect to the Trustee,
any officer within the corporate trust department of the Trustee, including any
vice president, assistant vice president, assistant secretary, trust officer or
any other officer of the Trustee who customarily performs functions similar to
those performed by the Persons who at the time shall be such officers,
respectively, or to whom any corporate trust matter is referred because of such
person's knowledge of and familiarity with the particular subject and who, in
each case, shall have direct responsibility for the administration of this
Indenture.

            "Restricted Security" means a Security required to bear the
restrictive legend set forth in the form of Security set forth in Exhibits A-1
and A-3 of this Indenture.

            "Rule 144" means Rule 144 under the Securities Act (or any
successor rule having substantially similar provisions), as it may be amended
from time to time.

            "Rule 144A" means Rule 144A under the Securities Act (or any
successor rule having substantially similar provisions), as it may be amended
from time to time.

            "Sale Price" of Capital Stock on any date means (a) the closing per
share sale price (or, if no closing sale price is reported, the average of the
bid and ask prices or, if more than one in either case, the average of the
average bid and the average ask prices) on such date as reported on the Nasdaq
National Market or such other United States securities exchange on which the
Capital Stock is traded or, if the Capital Stock is not listed on a United
States national or regional securities exchange, as reported by the National
Association of Securities Dealers Automated Quotation System or by the National
Quotation Bureau Incorporated or (b) in the absence of such quotation, such
price as the Company shall determine on the basis of such quotations as the
Company considers appropriate.

            "SEC" means the United States Securities and Exchange Commission.

            "Securities" means any of the Company's Senior Convertible Notes due
2023, as amended or supplemented from time to time, issued under this Indenture.

            "Securityholder" or "Holder" means a person in whose name a Security
is registered on the Registrar's books.

            "Significant Subsidiary", as such term is defined in Rule 1-02 of
Regulation S-X under the Securities Act of 1933, as amended.
<PAGE>
                                      -6-

            "Special Record Date" means, with respect to the payment of any
Defaulted Interest, the date fixed by the Trustee pursuant to Section 12.02.

            "Stated Maturity", when used with respect to any Security, means the
date specified in such Security as the fixed date on which an amount equal to
the Principal Amount at Maturity of such Security is due and payable.

            "Subsidiary" means (i) a corporation, a majority of whose Capital
Stock with voting power, under ordinary circumstances, to elect directors is, at
the date of determination, directly or indirectly owned by the Company, by one
or more Subsidiaries of the Company or by the Company and one or more
Subsidiaries of the Company, (ii) a partnership in which the Company or a
Subsidiary of the Company holds a majority interest in the equity capital or
profits of such partnership, or (iii) any other person (other than a corporation
or a partnership) in which the Company, a Subsidiary of the Company or the
Company and one or more Subsidiaries of the Company, directly or indirectly, at
the date of determination, have (x) at least a majority ownership interest or
(y) the power to elect or direct the election of a majority of the directors or
other governing body of such person.

            "Tax Event" means that the Company shall have received an opinion
from independent tax counsel experienced in such matters to the effect that, on
or after June 11, 2003, as a result of (a) any amendment to, or change
(including any announced prospective change) in, the laws (or any regulations
thereunder) of the United States or any political subdivision or taxing
authority thereof or therein or (b) any amendment to, or change in, an
interpretation or application (including through litigation or a settlement
involving the Company) of such laws or regulations by any legislative body,
court, governmental agency or regulatory authority, in each case which amendment
or change is enacted, promulgated, issued or announced or which interpretation
is issued or announced or which action is taken, on or after June 11, 2003,
there is more than an insubstantial risk that interest (including accrued
Original Issue Discount) payable on the Securities either (i) would not be
deductible on a current accrual basis or (ii) would not be deductible under any
other method, in either case in whole or in part, by the Company (by reason of
deferral, disallowance, or otherwise) for United States federal income tax
purposes.

            "TIA" means the Trust Indenture Act of 1939 as in effect on the date
of this Indenture, provided, however, that in the event the TIA is amended after
such date, TIA means, to the extent required by any such amendment, the TIA as
so amended.

            "Time of Determination" means the time and date of the earlier of
(i) the determination of stockholders entitled to receive rights, warrants or
options or a distribution, in each case, to which Section 11.07 or 11.08 applies
and (ii) the time ("Ex-Dividend Time") immediately prior to the commencement of
"ex-dividend" trading for such rights, warrants or options or distribution on
the Nasdaq National Market or such other national or regional exchange or market
on which the Common Stock is then listed or quoted.
<PAGE>
                                      -7-

            "trading day" means a day during which trading in securities
generally occurs on the Nasdaq National Market or, if the Common Stock is not
listed on the Nasdaq National Market, on the principal other national or
regional securities exchange on which the Common Stock is then listed or, if the
Common Stock is not listed on a national or regional securities exchange, on the
National Association of Securities Dealers Automated Quotation System or, if the
Common Stock is not quoted on the National Association of Securities Dealers
Automated Quotation System, on the principal other market on which the Common
Stock is then traded.

            "Trustee" means the party named as the "Trustee" in the first
paragraph of this Indenture until a successor replaces it pursuant to the
applicable provisions of this Indenture and, thereafter, shall mean such
successor. The foregoing sentence shall likewise apply to any subsequent such
successor or successors.

            SECTION 1.02 Other Definitions.
<TABLE>
<CAPTION>

                                                                                     Defined in
          Term                                                                         Section

<S>                                                                                  <C>
         "Act"..................................................................        1.05(a)
         "Agent Members"........................................................        2.12(f)
         "Bankruptcy Law"......................................................         6.01
         "beneficial owner".....................................................        3.09(a)
         "cash".................................................................        3.08(b)
         "Change in Control"....................................................        3.09(a)
         "Change in Control Purchase Date"......................................        3.09(a)
         "Change in Control Purchase Notice"....................................        3.09(c)
         "Change in Control Purchase Price".....................................        3.09(a)
         "Company Notice".......................................................        3.08(e)
         "Company Notice Date"..................................................        3.08(c)
         "Continuing Directors".................................................        3.09(a)
         "Conversion Agent".....................................................        2.03
         "Conversion Date"......................................................        11.02
         "Conversion Rate"......................................................        11.01
         "Custodian"............................................................        6.01
         "Defaulted Interest"...................................................        12.02
         "Depositary"...........................................................        2.01(a)
         "DTC"..................................................................        2.01(a)
         "Event of Default".....................................................        6.01
         "Exchange Act".........................................................        3.08(d)
         "Ex-Dividend Measurement Period".......................................        11.08
         "Extraordinary Cash Dividend"..........................................        11.08
         "Institutional Accredited Investors"...................................        2.01(b)
         "Interest Payment Date"................................................        10.01
</TABLE>
<PAGE>
                                      -8-
<TABLE>
<S>                                                                                     <C>

         "Legal Holiday"........................................................        14.09
         "Legend"...............................................................        2.06(f)
         "Market Price".........................................................        3.08(d)
         "Notice of Default"....................................................        6.01
         "Option Exercise Date".................................................        10.01
         "Paying Agent".........................................................        2.03
         "Protected Purchaser"..................................................        2.07
         "Purchase Date"........................................................        3.08(a)
         "Purchase Notice"......................................................        3.08(a)
         "Purchase Price".......................................................        3.08(a)
         "QIBs".................................................................        2.01(a)
         "Registrar"............................................................        2.03
         "Regular Record Date"..................................................        10.01
         "Relevant Cash Dividends"..............................................        11.08
         "Restated Principal Amount"............................................        10.01
         "Rights"...............................................................        11.19
         "Rights Agreement".....................................................        11.19
         "Rule 144A Information"................................................        4.06
         "Securities Act".......................................................        3.08(d)

         "Special Record Date"..................................................        12.02

         "Tax Event Date".......................................................        10.01

</TABLE>

            SECTION 1.03 Incorporation by Reference of Trust Indenture Act.
Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. The following
TIA terms used in this Indenture have the following meanings:

            "Commission" means the SEC.

            "indenture securities" means the Securities.

            "indenture security holder" means a Securityholder.

            "indenture to be qualified" means this Indenture.

            "indenture trustee" or "institutional trustee" means the Trustee.

            "obligor" on the indenture securities means the Company.

            All other TIA terms used in this Indenture that are defined by the
TIA, defined by TIA reference to another statute or defined by SEC rule have the
meanings assigned to them by such definitions.

            SECTION 1.04 Rules of Construction. Unless the context otherwise
requires:
<PAGE>
                                      -9-

            (1) a defined term has the meaning assigned to it;

            (2) an accounting term not otherwise defined has the meaning
assigned to it in accordance with United States generally accepted accounting
principles as in effect from time to time;

            (3) "or" is not exclusive;

            (4) "including" means including, without limitation; and

            (5) words in the singular include the plural, and words in the
plural include the singular.

            SECTION 1.05 Acts of Holders.

            (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders may be embodied in and evidenced by one or more instruments (which may
take the form of an electronic writing or messaging or otherwise be in
accordance with customary procedures of the Depositary or the Trustee) of
substantially similar tenor signed by such Holders in person or by an agent duly
appointed in writing (which may be in electronic form); and, except as herein
otherwise expressly provided, such action shall become effective when such
instrument or instruments are delivered to the Trustee and, when it is hereby
expressly required, to the Company. Such instrument or instruments (and the
action embodied therein and evidenced thereby) are herein sometimes referred to
as the "Act" of Holders signing such instrument or instruments. Proof of
execution of any such instrument or of a writing appointing any such agent
(either of which may be in electronic form) shall be sufficient for any purpose
of this Indenture and conclusive in favor of the Trustee and the Company, if
made in the manner provided in this Section.

            (b) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution (or electronic delivery) or by a certificate of a notary public or
other officer authorized by law to take acknowledgments of deeds, certifying
that the individual signing or delivering such instrument or writing
acknowledged to such officer the execution (or electronic delivery) thereof.
When such execution is by a signer acting in a capacity other than such signer's
individual capacity, such certificate or affidavit shall also constitute
sufficient proof of such signer's authority. The fact and date of the execution
of any such instrument or writing (electronic or otherwise), or the authority of
the Person executing the same, may also be proved in any other manner which the
Trustee deems sufficient.

            (c) The ownership of Securities shall be proved by the register
maintained by the Registrar.

            (d) Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security shall bind every future Holder
of the same Security and
<PAGE>
                                      -10-

the holder of every Security issued upon the registration of transfer thereof or
in exchange therefor or in lieu thereof in respect of anything done, omitted or
suffered to be done by the Trustee or the Company in reliance thereon, whether
or not notation of such action is made upon such Security.

            (e) If the Company shall solicit from the Holders any request,
demand, authorization, direction, notice, consent, waiver or other Act, the
Company may, at its option, by or pursuant to a resolution of the Board of
Directors, fix in advance a record date for the determination of Holders
entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Company shall have no obligation to do so.
If such a record date is fixed, such request, demand, authorization, direction,
notice, consent, waiver or other Act may be given before or after such record
date, but only the Holders of record at the close of business on such record
date shall be deemed to be Holders for the purposes of determining whether
Holders of the requisite proportion of outstanding Securities have authorized or
agreed or consented to such request, demand, authorization, direction, notice,
consent, waiver or other Act, and for that purpose the outstanding Securities
shall be computed as of such record date; provided that no such authorization,
agreement or consent by the Holders on such record date shall be deemed
effective unless it shall become effective pursuant to the provisions of this
Indenture within six months after the record date.

                                   ARTICLE 2

                                 THE SECURITIES

            SECTION 2.01 Form and Dating. The Securities and the Trustee's
certificate of authentication shall be substantially in the form of Exhibits A-1
and A-3, which are a part of this Indenture. The Securities may have notations,
legends or endorsements required by law, stock exchange rule or usage (provided
that any such notation, legend or endorsement required by usage is in a form
acceptable to the Company). The Company shall provide any such notations,
legends or endorsements to the Trustee in writing. Each Security shall be dated
the date of its authentication.

            (a) 144A Global Securities. Securities offered and sold within the
United States to "qualified institutional buyers" as defined in Rule 144A
("QIBs") in reliance on Rule 144A shall be issued initially in the form of a
144A Global Security, which shall be deposited with the Trustee at its Corporate
Trust Office, as custodian for the Depositary, and registered in the name of The
Depository Trust Company ("DTC") or the nominee thereof (such depositary, or any
successor thereto, and any such nominee being hereinafter referred to as the
"Depositary"), duly executed by the Company and authenticated by the Trustee as
hereinafter provided. The aggregate Principal Amount at Maturity of the 144A
Global Securities may from time to time be increased or decreased by adjustments
made on the records of the Trustee and the Depositary as hereinafter provided.
<PAGE>
                                      -11-

            (b) Institutional Accredited Investor Securities. Except as provided
in this Section 2.01 or Section 2.06 or 2.12, owners of beneficial interests in
Global Securities will not be entitled to receive physical delivery of
Certificated Securities. Securities offered and sold within the United States to
institutional "accredited investors" as defined in Rule 501(a)(1), (2) (3) and
(7) under the Securities Act ("Institutional Accredited Investors") shall be
issued initially in the form of an Institutional Accredited Investor Security,
duly executed by the Company and authenticated by the Trustee as hereinafter
provided.

            (c) Global Securities in General. Each Global Security shall
represent such of the outstanding Securities as shall be specified therein and
each shall provide that it shall represent the aggregate Principal Amount at
Maturity of outstanding Securities from time to time endorsed thereon and that
the aggregate Principal Amount at Maturity of outstanding Securities represented
thereby may from time to time be reduced or increased, as appropriate, to
reflect exchanges, redemptions and conversions.

            Any adjustment of the aggregate Principal Amount at Maturity of a
Global Security to reflect the amount of any increase or decrease in the
Principal Amount at Maturity of outstanding Securities represented thereby shall
be made by the Trustee in accordance with instructions given by the Holder
thereof as required by Section 2.12 hereof and shall be made on the records of
the Trustee and the Depositary.

            (d) Book-Entry Provisions. This Section 2.01(d) shall apply only to
Global Securities deposited with or on behalf of the Depositary.

            The Company shall execute and the Trustee shall, in accordance with
this Section 2.01(d), authenticate and deliver initially one or more Global
Securities that (a) shall be registered in the name of the Depositary, (b) shall
be delivered by the Trustee to the Depositary or pursuant to the Depositary's
instructions or held by the Trustee as custodian for such Depositary and (c)
shall bear legends substantially to the following effect:

            "UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
            REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS
            AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY
            CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN
            SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
            THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE
            & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
            REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER,
            PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
            PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO.,
            HAS AN INTEREST HEREIN.
<PAGE>
                                      -12-

            TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS, IN
            WHOLE BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY TRUST COMPANY
            OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS
            OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS
            MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN ARTICLE 2 OF
            THE INDENTURE REFERRED TO ON THE REVERSE HEREOF."

            (e) Certificated Securities. Securities not issued as interests in
the Global Securities will be issued in certificated form substantially in the
form of Exhibit A-3 attached hereto.

            (f) U.S. Tax Legend. All Securities shall bear the following legend:

            "THIS NOTE WAS ISSUED WITH ORIGINAL ISSUE DISCOUNT, FOR PURPOSES OF
            SECTIONS 1272, 1273 AND 1275 OF THE UNITED STATES INTERNAL REVENUE
            CODE OF 1986, AS AMENDED. THE ISSUE PRICE OF THIS NOTE WAS $397.27
            PER $1,000 OF PRINCIPAL AMOUNT AT MATURITY; THE AMOUNT OF ORIGINAL
            ISSUE DISCOUNT, INCLUDING CASH INTEREST PAYABLE THROUGH JUNE 16,
            2008 TAXABLE AS ORIGINAL ISSUE DISCOUNT UNDER TREASURY REGULATION
            SECTION 1.1273-1, IS $726.88 PER $1,000 OF PRINCIPAL AMOUNT AT
            MATURITY; THE ISSUE DATE IS JUNE 16, 2003; AND THE YIELD TO MATURITY
            FOR THE PURPOSES OF ACCRUING TAX ORIGINAL ISSUE DISCOUNT IS 6.25%
            PER ANNUM, CALCULATED ON A SEMIANNUAL BOND EQUIVALENT BASIS."

            SECTION 2.02 Execution and Authentication. The Securities shall be
executed on behalf of the Company by any Officer. The signature of the Officer
on the Securities may be manual or facsimile.

            Securities bearing the manual or facsimile signatures of an
individual who was at the time of the execution of the Securities the proper
Officer of the Company shall bind the Company, notwithstanding that such
individual has ceased to hold such office prior to the authentication and
delivery of such Securities or did not hold such office at the date of
authentication of such Securities.

            No Security shall be entitled to any benefit under this Indenture or
be valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein duly
executed by the Trustee by manual signature of an authorized signatory of the
Trustee and such certificate upon any Security shall be conclusive evidence, and
the only evidence, that such Security has been duly authenticated and delivered
hereunder.
<PAGE>
                                      -13-

            The Trustee shall authenticate and deliver Securities for original
issue in an aggregate Principal Amount at Maturity of up to $252,000,000 upon a
Company Order without any further action by the Company. The aggregate Principal
Amount at Maturity of Securities outstanding at any time may not exceed the
amount set forth in the foregoing sentence, except as provided in Section 2.07.

            The Securities shall be issued only in registered form without
coupons and only in denominations of $1,000 of Principal Amount at Maturity and
any integral multiple thereof.

            SECTION 2.03 Registrar, Paying Agent and Conversion Agent. The
Company shall maintain an office or agency where Securities may be presented for
registration of transfer or for exchange ("Registrar"), an office or agency
where Securities may be presented for purchase or payment ("Paying Agent") and
an office or agency where Securities may be presented for conversion
("Conversion Agent"). The Registrar shall keep a register of the Securities and
of their transfer and exchange. The Company may have one or more co-registrars,
one or more additional paying agents and one or more additional conversion
agents. The term "Paying Agent" includes any additional paying agent, including
any named pursuant to Section 4.05. The term "Conversion Agent" includes any
additional conversion agent, including any named pursuant to Section 4.05.

            The Company shall enter into an appropriate agency agreement with
any Registrar or co-registrar, Paying Agent or Conversion Agent (other than the
Trustee). The agreement shall implement the provisions of this Indenture that
relate to such agent. The Company shall notify the Trustee of the name and
address of any such agent. If the Company fails to maintain a Registrar, Paying
Agent or Conversion Agent, the Trustee shall act as such and shall be entitled
to appropriate compensation therefor pursuant to Section 7.07. The Company or
any Subsidiary or an Affiliate of either of them may act as Paying Agent,
Registrar, Conversion Agent or co-registrar.

            The Company initially appoints the Trustee as Registrar, Conversion
Agent and Paying Agent in connection with the Securities.

            SECTION 2.04 Paying Agent to Hold Money and Securities in Trust.
Except as otherwise provided herein, not later than 11:30 a.m., New York City
time, on each due date of payments in respect of any Security, the Company shall
deposit with the Paying Agent a sum of money (in immediately available funds if
deposited on the due date) or Common Stock sufficient to make such payments when
so becoming due. The Company shall require each Paying Agent (other than the
Trustee) to agree in writing that the Paying Agent shall hold in trust for the
benefit of Securityholders or the Trustee all money and Common Stock held by the
Paying Agent for the making of payments in respect of the Securities and shall
notify the Trustee of any default by the Company in making any such payment. At
any time during the continuance of any such default, the Paying Agent shall,
upon the written request of the Trustee, forthwith pay to the Trustee all money
and Common Stock so held in trust. If the Company, a Subsidiary or an Affiliate
of either of them acts as Paying Agent, it shall segregate the money and Common
Stock held by
<PAGE>
                                      -14-

it as Paying Agent and hold it as a separate trust fund. The Company at any time
may require a Paying Agent to pay all money and Common Stock held by it to the
Trustee and to account for any funds and Common Stock disbursed by it. Upon
doing so, the Paying Agent shall have no further liability for the money or
Common Stock.

            SECTION 2.05 Securityholder Lists. The Trustee shall preserve in as
current a form as is reasonably practicable the most recent list available to it
of the names and addresses of Securityholders. If the Trustee is not the
Registrar, the Company shall cause to be furnished to the Trustee at least
semiannually on June 1 and December 1 a listing of Securityholders dated within
15 days of the date on which the list is furnished and at such other times as
the Trustee may request in writing a list in such form and as of such date as
the Trustee may reasonably require of the names and addresses of
Securityholders.

            SECTION 2.06 Transfer and Exchange. Subject to Section 2.12 hereof,

            (a) Upon surrender for registration of transfer of any Security,
together with a written instrument of transfer satisfactory to the Registrar
duly executed by the Securityholder or such Securityholder's attorney duly
authorized in writing, at the office or agency of the Company designated as
Registrar or co-registrar pursuant to Section 2.03, the Company shall execute,
and the Trustee upon receipt of a Company Order shall authenticate and deliver,
in the name of the designated transferee or transferees, one or more new
Securities of any authorized denomination or denominations, of a like aggregate
Principal Amount at Maturity. The Company shall not charge a service charge for
any registration of transfer or exchange, but the Company may require payment of
a sum sufficient to pay all taxes, assessments or other governmental charges
that may be imposed in connection with the registration of transfer or exchange
of the Securities from the Securityholder requesting such registration of
transfer or exchange.

            At the option of the Holder, Certificated Securities may be
exchanged for other Securities of any authorized denomination or denominations,
of a like aggregate Principal Amount at Maturity, upon surrender of the
Securities to be exchanged, together with a written instrument of transfer
satisfactory to the Registrar duly executed by the Securityholder or such
Securityholder's attorney duly authorized in writing, at such office or agency.
Whenever any Securities are so surrendered for exchange, the Company shall
execute, and the Trustee upon receipt of a Company Order shall authenticate and
deliver, the Securities which the Holder making the exchange is entitled to
receive.

            The Company shall not be required to make, and the Registrar need
not register, transfers or exchanges of Securities selected for redemption
(except, in the case of Securities to be redeemed in part, the portion thereof
not to be redeemed) or any Securities in respect of which a Purchase Notice or
Change in Control Purchase Notice has been given and not withdrawn by the Holder
thereof in accordance with the terms of this Indenture (except, in the case of
Securities to be purchased in part, the portion thereof not to be purchased) or
any Securities for a period of 15 days before the mailing of a notice of
redemption of Securities to be redeemed.
<PAGE>
                                      -15-

            (b) Notwithstanding any provision to the contrary herein, so long as
a Global Security remains outstanding and is held by or on behalf of the
Depositary, transfers of a Global Security, in whole or in part, shall be made
only in accordance with Section 2.12 and this Section 2.06(b). Transfers of a
Global Security shall be limited to transfers of such Global Security in whole,
or in part, to nominees of the Depositary or to a successor of the Depositary or
such successor's nominee.

            (c) Successive registrations and registrations of transfers and
exchanges as aforesaid may be made from time to time as desired, and each such
registration shall be noted on the register for the Securities.

            (d) Any Registrar appointed pursuant to Section 2.03 hereof shall
provide to the Trustee such information as the Trustee may reasonably require in
connection with the delivery by such Registrar of Securities upon registration
of transfer or exchange of Securities.

            (e) No Registrar shall be required to make registrations of transfer
or exchange of Securities during any periods designated in the text of the
Securities or in this Indenture as periods during which such registration of
transfers and exchanges need not be made.

            (f) If Securities are issued upon the registration of transfer,
exchange or replacement of Securities subject to restrictions on transfer and
bearing the legends set forth on the form of Security attached hereto as
Exhibits A-1 and A-3 setting forth such restrictions (collectively, the
"Legend"), or if a request is made to remove the Legend on a Security, the
Securities so issued shall bear the Legend, or the Legend shall not be removed,
as the case may be, unless there is delivered to the Company and the Registrar
such satisfactory evidence, which shall include an Opinion of Counsel, as may be
reasonably required by the Company and the Registrar, that neither the Legend
nor the restrictions on transfer set forth therein are required to ensure that
transfers thereof comply with the provisions of Rule 144A or Rule 144 or that
such Securities are not "restricted" within the meaning of Rule 144. Upon (i)
provision of such satisfactory evidence, or (ii) notification by the Company to
the Trustee and Registrar of the sale of such Security pursuant to a
registration statement that is effective at the time of such sale, the Trustee,
upon receipt of a Company Order, shall authenticate and deliver a Security that
does not bear the Legend. If the Legend is removed from the face of a Security
and the Security is subsequently held by an Affiliate of the Company, the
Company shall use its reasonable best efforts to reinstate the Legend.

            The Trustee and the Registrar shall have no obligation or duty to
monitor, determine or inquire as to compliance with any restrictions on transfer
imposed under this Indenture or under applicable law with respect to any
transfer of any interest in any Security (including any transfers between or
among Depositary participants or beneficial owners of interests in any Global
Security) other than to require delivery of such certificates and other
documentation or evidence as are expressly required by, and to do so if and when
expressly required by the terms of, this Indenture, and to examine the same to
determine substantial compliance as to form with the express requirements
hereof.
<PAGE>
                                      -16-

            SECTION 2.07 Replacement Securities. If (a) any mutilated Security
is surrendered to the Trustee, or (b) the Company and the Trustee receive
evidence to their satisfaction of the destruction, loss or theft of any
Security, and there is delivered to the Company and the Trustee such security or
indemnity as may be required by them to save each of them harmless, then, in the
absence of notice to the Company or the Trustee that such Security has been
acquired by a protected purchaser within the meaning of Article 8 of the Uniform
Commercial Code (a "Protected Purchaser"), the Company shall execute and upon
receipt of a Company Order, the Trustee shall authenticate and deliver, in
exchange for any such mutilated Security or in lieu of any such destroyed, lost
or stolen Security, a new Security of like tenor and Principal Amount at
Maturity, bearing a number not contemporaneously outstanding.

            In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, or is about to be purchased by the
Company pursuant to Article 3 hereof, the Company in its discretion may, instead
of issuing a new Security, pay or purchase such Security, as the case may be.

            Upon the issuance of any new Securities under this Section, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

            Every new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all benefits of this Indenture equally and proportionately with any
and all other Securities duly issued hereunder.

            The provisions of this Section are exclusive and shall preclude (to
the extent lawful) all other rights and remedies with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities.

            SECTION 2.08 Outstanding Securities; Determinations of Holders'
Action. Securities outstanding at any time are all the Securities authenticated
by the Trustee, except for those cancelled by it, those paid pursuant to Section
2.10 and delivered to it for cancellation and those described in this Section
2.08 as not outstanding. A Security does not cease to be outstanding because the
Company or an Affiliate thereof holds the Security; provided, however, that in
determining whether the Holders of the requisite Principal Amount at Maturity of
Securities have given or concurred in any request, demand, authorization,
direction, notice, consent or waiver hereunder, Securities owned by the Company
or any other obligor upon the Securities or any Affiliate of the Company or such
other obligor shall be disregarded and deemed not to be outstanding, except
that, in determining whether the Trustee shall be protected in relying upon any
such request, demand, authorization, direction, notice, consent or waiver, only
Securities which a Responsible Officer of the Trustee actually knows to be so
owned shall be so disregarded. Subject to the foregoing, only Securities
outstanding at the time of such determination
<PAGE>
                                      -17-

shall be considered in any such determination (including, without limitation,
determinations pursuant to Articles 6 and 9).

            If a Security is replaced pursuant to Section 2.07, the replaced
Security ceases to be outstanding unless the Trustee and the Company receive
proof satisfactory to each of them that the replaced Security is held by a
Protected Purchaser unaware that such Security has been replaced, in which case
the replacement security shall be deemed not to be outstanding.

            If the Paying Agent holds, in accordance with this Indenture, on a
Redemption Date, or on the Business Day following the Purchase Date or a Change
in Control Purchase Date, or on Stated Maturity, money or securities, if
permitted hereunder, sufficient to pay Securities payable on that date, then
immediately after such Redemption Date, Purchase Date, Change in Control
Purchase Date or Stated Maturity, as the case may be, such Securities shall
cease to be outstanding and Original Issue Discount or cash interest on such
Securities shall cease to accrue; provided, that if such Securities are to be
redeemed, notice of such redemption has been duly given pursuant to this
Indenture.

            If a Security is converted in accordance with Article 11, then from
and after the time of conversion on the Conversion Date, such Security shall
cease to be outstanding and Original Issue Discount or cash interest shall cease
to accrue on such Security.

            SECTION 2.09 Temporary Securities. Pending the preparation of
definitive Securities, the Company may execute, and upon Company Order, the
Trustee shall authenticate and deliver, temporary Securities which are printed,
lithographed, typewritten, mimeographed or otherwise produced, in any authorized
denomination, substantially of the tenor of the definitive Securities in lieu of
which they are issued and with such appropriate insertions, omissions,
substitutions and other variations as the officers executing such Securities may
determine, as conclusively evidenced by their execution of such Securities.

            If temporary Securities are issued, the Company will cause
definitive Securities to be prepared without unreasonable delay. After the
preparation of definitive Securities, the temporary Securities shall be
exchangeable for definitive Securities upon surrender of the temporary
Securities at the office or agency of the Company designated for such purpose
pursuant to Section 2.03, without charge to the Holder. Upon surrender for
cancellation of any one or more temporary Securities the Company shall execute
and upon Company Order the Trustee shall authenticate and deliver in exchange
therefor a like Principal Amount at Maturity of definitive Securities of
authorized denominations. Until so exchanged the temporary Securities shall in
all respects be entitled to the same benefits under this Indenture as definitive
Securities.

            SECTION 2.10 Cancellation. All Securities surrendered for payment,
purchase by the Company pursuant to Article 3, conversion, redemption or
registration of transfer or exchange shall, if surrendered to any person other
than the Trustee, be delivered to the Trustee and shall be promptly cancelled by
it. The Company may at any time deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company

<PAGE>
                                      -18-

may have acquired in any manner whatsoever, and all Securities so delivered
shall be promptly cancelled by the Trustee. The Company may not issue new
Securities to replace Securities it has paid or delivered to the Trustee for
cancellation or that any Holder has converted pursuant to Article 11. No
Securities shall be authenticated in lieu of or in exchange for any Securities
cancelled as provided in this Section, except as expressly permitted by this
Indenture. All cancelled Securities held by the Trustee shall be disposed of by
the Trustee.

            SECTION 2.11 Persons Deemed Owners. Prior to due presentment of a
Security for registration of transfer, the Company, the Trustee and any agent of
the Company or the Trustee may treat the Person in whose name such Security is
registered as the owner of such Security for the purpose of receiving payment of
principal of the Security or the payment of any Redemption Price, Purchase Price
or Change in Control Purchase Price in respect thereof or cash interest thereon,
for the purpose of conversion and for all other purposes whatsoever, whether or
not such Security be overdue, and neither the Company, the Trustee nor any agent
of the Company or the Trustee shall be affected by notice to the contrary.

            SECTION 2.12 Global Securities.

            (a) Notwithstanding any other provisions of this Indenture or the
Securities, (A) transfers of a Global Security, in whole or in part, shall be
made only in accordance with Section 2.06 and Section 2.12(b)(i), (B) transfer
of a beneficial interest in a Global Security for a Certificated Security shall
comply with Section 2.06 and Section 2.12(b)(i) below, and (C) transfers of a
Certificated Security shall comply with Section 2.06 and Section 2.12(b)(ii) and
transfer of a Certificated Security for a Beneficial Interest in a Global
Security shall comply with Section 2.06 and Section 2.12(b)(iii) below.

            (b) Transfer of Global Security. A Global Security may not be
transferred, in whole or in part, to any Person other than the Depositary or a
nominee or any successor thereof, and no such transfer to any such other Person
may be registered; provided that this Section 2.12(b) (i) shall not prohibit any
transfer of a Security that is issued in exchange for a Global Security but is
not itself a Global Security. No transfer of a Security to any Person shall be
effective under this Indenture or the Securities unless and until such Security
has been registered in the name of such Person. Nothing in this Section
2.12(b)(i) shall prohibit or render ineffective any transfer of a beneficial
interest in a Global Security effected in accordance with the other provisions
of this Section 2.12(b).

            (i) Restrictions on Transfer of a Beneficial Interest in a Global
      Security for a Certificated Security. A beneficial interest in a Global
      Security may not be exchanged for a Certificated Security except upon
      satisfaction of the requirements set forth below. Upon receipt by the
      Trustee of a request for transfer of a beneficial interest in a Global
      Security in accordance with Applicable Procedures for a Certificated
      Security in the form satisfactory to the Trustee, together with:

<PAGE>

                                      -19-

                  (A) so long as the Securities are Restricted Securities,
            certification, in the form set forth in Exhibit B-1, and, if
            requested by the Company or the Registrar, certification in the form
            set forth in Exhibit B-2, that such beneficial interest in the
            Global Security is being transferred to an Institutional Accredited
            Investor that satisfies the definitions set forth in subparagraph
            (a)(1), (2), (3) or (7) of Rule 501 under the Securities Act;

                  (B) written instructions to the Trustee to make, or direct the
            Registrar to make, an adjustment on its books and records with
            respect to such Global Security to reflect a decrease in the
            aggregate Principal Amount at Maturity of the Securities represented
            by the Global Security, such instructions to contain information
            regarding the Depositary account to be credited with such decrease;
            and

                  (C) if the Company or Registrar so requests, an Opinion of
            Counsel or other evidence reasonably satisfactory to them as to the
            compliance with the restrictions set forth in the Legend,

      then the Trustee shall cause, or direct the Registrar to cause, in
      accordance with the standing instructions and procedures existing between
      the Depositary and the Registrar, the aggregate Principal Amount at
      Maturity of Securities represented by the Global Security to be decreased
      by the aggregate Principal Amount at Maturity of the Certificated Security
      to be issued, shall authenticate and deliver such Certificated Security
      and shall instruct the Depositary to debit or cause to be debited to the
      account of the Person specified in such instructions a beneficial interest
      in the Global Security equal to the Principal Amount at Maturity of the
      Certificated Security so issued.

            (ii) Transfer and Exchange of Certificated Securities. When
      Certificated Securities are presented to the Registrar with a request:

                  (x) to register the transfer of such Certificated Securities;
            or

                  (y) to exchange such Certificated Securities for an equal
            Principal Amount at Maturity of Certificated Securities of other
            authorized denominations,

      the Registrar shall register the transfer or make the exchange as
      requested if its reasonable requirements for such transaction are met;
      provided, however, that the Certificated Securities surrendered for
      registration of transfer or exchange:

                  (A) shall be duly endorsed or accompanied by a written
            instrument of transfer in form reasonably satisfactory to the
            Company and the Registrar, duly executed by the Holder thereof or
            his attorney duly authorized in writing; and

                  (B) so long as such Securities are Restricted Securities, such
            Securities are being transferred or exchanged pursuant to an
            effective registration statement
<PAGE>
                                      -20-

            under the Securities Act or, if being transferred pursuant to clause
            (1), (2) or (3) below, are accompanied by the additional information
            and documents specified in each clause, as applicable:

                        (1) if such Certificated Securities are being delivered
                  to the Registrar by a Holder for registration in the name of
                  such Holder, without transfer, a certification from such
                  Holder to that effect; or

                        (2) if such Certificated Securities are being
                  transferred to the Company, a certification to that effect; or

                        (3) if such Certificated Securities are being
                  transferred pursuant to an exemption from registration (i) a
                  certification to that effect (in the form set forth in Exhibit
                  B-1 and B-2, if applicable) and (ii) if the Company or
                  Registrar so requests, an Opinion of Counsel or other evidence
                  reasonably satisfactory to them as to the compliance with the
                  restrictions set forth in the Legend.

            (iii) Restrictions on Transfer of a Certificated Security for a
      Beneficial Interest in a Global Security. A Certificated Security may not
      be exchanged for a beneficial interest in a Global Security except upon
      satisfaction of the requirements set forth below. Upon receipt by the
      Trustee of a Certificated Security, duly endorsed or accompanied by
      appropriate instruments of transfer, in form satisfactory to the Trustee,
      together with:

                  (A) so long as the Securities are Restricted Securities,
            certification, in the form set forth in Exhibit B-1, that such
            Certificated Security is being transferred to a QIB in accordance
            with Rule 144A; and

                  (B) written instructions directing the Trustee to make, or to
            direct the Registrar to make, an adjustment on its books and records
            with respect to such Global Security to reflect an increase in the
            aggregate Principal Amount at Maturity of the Securities represented
            by the Global Security, such instructions to contain information
            regarding the Depositary account to be credited with such increase,

      then the Trustee shall cancel such Certificated Security and cause, or
      direct the Registrar to cause, in accordance with the standing
      instructions and procedures existing between the Depositary and the
      Registrar, the aggregate Principal Amount at Maturity of Securities
      represented by the Global Security to be increased by the aggregate
      Principal Amount at Maturity of the Certificated Security to be exchanged,
      and shall instruct the Depositary to credit or cause to be credited to the
      account of the Person specified in such instructions a beneficial interest
      in the Global Security equal to the Principal Amount at Maturity of the
      Certificated Security so cancelled. If no Global Securities are then
      outstanding,
<PAGE>
                                      -21-

      the Company shall issue and the Trustee, upon receipt of a Company Order,
      shall authenticate a new Global Security in the appropriate Principal
      Amount at Maturity.

            (c) Subject to the succeeding paragraph, every Security shall be
subject to the restrictions on transfer provided in the Legend including the
requirement of the delivery of an Opinion of Counsel, if so provided. Whenever
any Restricted Security is presented or surrendered for registration of transfer
or for exchange for a Security registered in a name other than that of the
Holder, such Security must be accompanied by a certificate in substantially the
form set forth in Exhibit B-1, dated the date of such surrender and signed by
the Holder of such Security, as to compliance with such restrictions on
transfer. The Registrar shall not be required to accept for such registration of
transfer or exchange any Security not so accompanied by a properly completed
certificate.

            (d) The restrictions imposed by the Legend upon the transferability
of any Security shall cease and terminate when such Security has been sold
pursuant to an effective registration statement under the Securities Act or
transferred in compliance with Rule 144 or, if earlier, upon the expiration of
the holding period applicable to sales thereof under paragraph (k) of Rule 144.
Any Security as to which such restrictions on transfer shall have expired in
accordance with their terms or shall have terminated may, upon a surrender of
such Security for exchange to the Registrar in accordance with the provisions of
this Section 2.12 (accompanied, in the event that such restrictions on transfer
have terminated by reason of a transfer in compliance with Rule 144, by an
opinion of counsel having substantial experience in practice under the
Securities Act and otherwise reasonably acceptable to the Company, addressed to
the Company, the Trustee and the Registrar and in form acceptable to the
Company, to the effect that the transfer of such Security has been made in
compliance with Rule 144), be exchanged for a new Security, of like tenor and
aggregate Principal Amount at Maturity, which shall not bear the restrictive
Legend. The Company shall inform the Trustee of the effective date of any
registration statement registering the Securities under the Securities Act. The
Trustee and the Registrar shall not be liable for any action taken or omitted to
be taken by it in good faith in accordance with the aforementioned opinion of
counsel or registration statement.

            (e) As used in the preceding two paragraphs of this Section 2.12,
the term "transfer" encompasses any sale, pledge, transfer, hypothecation or
other disposition of any Security.

            (f) The provisions of clauses (1), (2), (3), (4) and (5) below shall
apply only to Global Securities:

            (1) Notwithstanding any other provisions of this Indenture or the
      Securities, except as provided in Section 2.12(b)(i), a Global Security
      shall not be exchanged in whole or in part for a Security registered in
      the name of any Person other than the Depositary or one or more nominees
      thereof, provided that a Global Security may be exchanged for Securities
      registered in the names of any person designated by the Depositary in the
      event that (i) the Depositary has notified the Company that it is
      unwilling or
<PAGE>
                                      -22-

      unable to continue as Depositary for such Global Security or such
      Depositary has ceased to be a "clearing agency" registered under the
      Exchange Act, and a successor Depositary is not appointed by the Company
      within 90 days; (ii) the Company elects to discontinue use of the system
      of book-entry transfer through DTC (or any successor depositary); or (iii)
      an Event of Default has occurred and is continuing with respect to the
      Securities. Any Global Security exchanged pursuant to subclause (i) of
      this clause (1) shall be so exchanged in whole and not in part, and any
      Global Security exchanged pursuant to subclause (ii) of this clause (1)
      may be exchanged in whole or from time to time in part as directed by the
      Depositary. Any Security issued in exchange for a Global Security or any
      portion thereof shall be a Global Security; provided that any such
      Security so issued that is registered in the name of a person other than
      the Depositary or a nominee thereof shall not be a Global Security.

            (2) Securities issued in exchange for a Global Security or any
      portion thereof shall be issued in definitive, fully registered form,
      without interest coupons, shall have an aggregate Principal Amount at
      Maturity equal to that of such Global Security or portion thereof to be so
      exchanged, shall be registered in such names and be in such authorized
      denominations as the Depositary shall designate and shall bear the
      applicable legends provided for herein. Any Global Security to be
      exchanged in whole shall be surrendered by the Depositary to the Trustee,
      as Registrar. With regard to any Global Security to be exchanged in part,
      either such Global Security shall be so surrendered for exchange or, if
      the Trustee is acting as custodian for the Depositary or its nominee with
      respect to such Global Security, the Principal Amount at Maturity thereof
      shall be reduced, by an amount equal to the portion thereof to be so
      exchanged, by means of an appropriate adjustment made on the records of
      the Trustee. Upon any such surrender or adjustment, the Trustee shall
      authenticate and deliver the Security issuable on such exchange to or upon
      the order of the Depositary or an authorized representative thereof.

            (3) Subject to the provisions of clause (5) below, the registered
      Holder may grant proxies and otherwise authorize any Person, including
      Agent Members (as defined below) and persons that may hold interests
      through Agent Members, to take any action which a holder is entitled to
      take under this Indenture or the Securities.

            (4) In the event of the occurrence of any of the events specified in
      clause (1) above, the Company will promptly make available to the Trustee
      a reasonable supply of Certificated Securities in definitive, fully
      registered form, without interest coupons.

            (5) Neither any members of, or participants in, the Depositary
      (collectively, the "Agent Members") nor any other Persons on whose behalf
      Agent Members may act shall have any rights under this Indenture with
      respect to any Global Security registered in the name of the Depositary or
      any nominee thereof, or under any such Global Security, and the Depositary
      or such nominee, as the case may be, may be treated by the Company, the
      Trustee, the Registrar, the Paying Agent and any agent of the Company, the
      Trustee,
<PAGE>
                                      -23-

      the Registrar or the Paying Agent as the absolute owner and holder of such
      Global Security for all purposes whatsoever. Notwithstanding the
      foregoing, nothing herein shall prevent the Company, the Trustee or any
      agent of the Company or the Trustee from giving effect to any written
      certification, proxy or other authorization furnished by the Depositary or
      such nominee, as the case may be, or impair, as between the Depositary,
      its Agent Members and any other person on whose behalf an Agent Member may
      act, the operation of customary practices of such Persons governing the
      exercise of the rights of a holder of any Security.

            SECTION 2.13 CUSIP Numbers. The Company in issuing the Securities
may use "CUSIP" numbers (if then generally in use), and, if so, the Trustee
shall use "CUSIP" numbers in notices of redemption as a convenience to Holders;
provided that any such notice may state that no representation is made as to the
correctness of such numbers either as printed on the Securities or as contained
in any notice of a redemption and that reliance may be placed only on the other
identification numbers printed on the Securities, and any such redemption shall
not be affected by any defect in or omission of such numbers. The Company will
promptly notify the Trustee of any change in the CUSIP numbers.

                                   ARTICLE 3

                            REDEMPTION AND PURCHASES

            SECTION 3.01 Right to Redeem; Notices to Trustee. The Company, at
its option, may redeem the Securities in accordance with the provisions of
paragraphs 5 and 7 of the Securities. Prior to June 16, 2008, the Company cannot
redeem the Securities. Beginning on June 16, 2008, the Company may redeem the
Securities for cash in whole at any time, or in part from time to time. If the
Company elects to redeem Securities pursuant to paragraph 5 of the Securities,
it shall notify the Trustee in writing of the Redemption Date, the Principal
Amount at Maturity of Securities to be redeemed, the Redemption Price and the
amount of accrued and unpaid cash interest, if any, payable on the Redemption
Date.

            The Company shall give the notice to the Trustee provided for in
this Section 3.01 by a Company Order, at least 45 days but not more than 60 days
before the Redemption Date (unless a shorter notice shall be satisfactory to the
Trustee). If fewer than all the Securities are to be redeemed, the record date
relating to such redemption shall be selected by the Company and given to the
Trustee, which record date shall not be less than ten days after the date of
notice to the Trustee.

            SECTION 3.02 Selection of Securities to Be Redeemed. If less than
all the Securities are to be redeemed, the Trustee shall select the Securities
to be redeemed pro rata or by lot or by any other method the Trustee considers
fair and appropriate (so long as such method is not prohibited by the rules of
any stock exchange on which the Securities are then listed). The Trustee shall
make the selection at least 30 days but not more than 60 days before the
Redemption Date from outstanding Securities not previously called for
redemption. The Trustee may
<PAGE>
                                      -24-

select for redemption portions of the Principal Amount at Maturity of Securities
that have denominations larger than $1,000.

            Securities and portions of them the Trustee selects shall be in
Principal Amounts at Maturity of $1,000 or an integral multiple of $1,000.
Provisions of this Indenture that apply to Securities called for redemption also
apply to portions of Securities called for redemption. The Trustee shall notify
the Company promptly of the Securities or portions of Securities to be redeemed.

            If any Security selected for partial redemption is converted in part
before termination of the conversion right with respect to the portion of the
Security so selected, the converted portion of such Security shall be deemed (so
far as may be) to be the portion selected for redemption. Securities which have
been converted during a selection of Securities to be redeemed may be treated by
the Trustee as outstanding for the purpose of such selection.

            SECTION 3.03 Notice of Redemption. At least 30 days but not more
than 60 days before a Redemption Date, the Company shall mail a notice of
redemption by first-class mail, postage prepaid, to each Holder of Securities to
be redeemed.

            The notice shall identify the Securities to be redeemed and shall
state:

            (1) the Redemption Date;

            (2) the Redemption Price and accrued and unpaid cash interest, if
any, payable on the Redemption Date;

            (3) the Conversion Rate;

            (4) the name and address of the Paying Agent and Conversion Agent;

            (5) that Securities called for redemption may be converted at any
time before the close of business on the second Business Day immediately
preceding the Redemption Date, even if not otherwise convertible at such time;

            (6) that Holders who want to convert Securities must satisfy the
requirements set forth in paragraph 8 of the Securities;

            (7) that Securities called for redemption must be surrendered to the
Paying Agent to collect the Redemption Price and accrued and unpaid cash
interest, if any;

            (8) if fewer than all the outstanding Securities are to be redeemed,
the certificate number and Principal Amounts at Maturity of the particular
Securities to be redeemed;
<PAGE>
                                      -25-

            (9) that, unless the Company defaults in making payment of such
Redemption Price and any cash interest which is due and payable, Original Issue
Discount and interest or cash interest will cease to accrue on and after the
Redemption Date;

            (10) the CUSIP number of the Securities; and

            (11) any other information the Company wants to present.

            At the Company's request, the Trustee shall give the notice of
redemption to Holders in the Company's name and at the Company's expense,
provided that the Company makes such request at least five Business Days (unless
a shorter period shall be satisfactory to the Trustee) prior to the date such
notice of redemption must be mailed.

            SECTION 3.04 Effect of Notice of Redemption. Once notice of
redemption is given, Securities called for redemption become due and payable on
the Redemption Date and at the Redemption Price (together with accrued and
unpaid cash interest, if any, to but not including the date of redemption)
stated in the notice except for Securities which are converted in accordance
with the terms of this Indenture. Upon surrender to the Paying Agent, such
Securities shall be paid at the Redemption Price (together with accrued and
unpaid cash interest, if any, to but not including the date of redemption)
stated in the notice.

            SECTION 3.05 Deposit of Redemption Price. Prior to 11:30 a.m. (New
York City time), on any Redemption Date, the Company shall deposit with the
Paying Agent (or if the Company or a Subsidiary or an Affiliate of either of
them is the Paying Agent, shall segregate and hold in trust) money sufficient to
pay the Redemption Price of, and any accrued and unpaid interest to but not
including the date of redemption with respect to, all Securities to be redeemed
on that date other than Securities or portions of Securities called for
redemption which on or prior thereto have been delivered by the Company to the
Trustee for cancellation or have been converted. The Paying Agent shall as
promptly as practicable return to the Company any money not required for that
purpose because of conversion of Securities pursuant to Article 11. If such
money is then held by the Company in trust and is not required for such purpose
it shall be discharged from such trust.

            SECTION 3.06 Securities Redeemed in Part. Upon surrender of a
Security that is redeemed in part, the Company shall execute and the Trustee
shall authenticate and deliver to the Holder a new Security in an authorized
denomination equal in Principal Amount at Maturity to the unredeemed portion of
the Security surrendered.

            SECTION 3.07 Conversion Arrangement on Call for Redemption. In
connection with any redemption of Securities, the Company may arrange for the
purchase and conversion of any Securities called for redemption by an agreement
with one or more investment banks or other purchasers to purchase such
Securities by paying to the Trustee in trust for the Securityholders, on or
prior to 11:30 a.m. New York City time on the Redemption Date, an amount that,
together with any amounts deposited with the Trustee by the Company for the
redemption of
<PAGE>
                                      -26-

such Securities, is not less than the Redemption Price of, and any accrued and
unpaid interest with respect to, such Securities. Notwithstanding anything to
the contrary contained in this Article 3, the obligation of the Company to pay
the Redemption Prices of such Securities shall be deemed to be satisfied and
discharged to the extent such amount is so paid by such purchasers. If such an
agreement is entered into, any Securities not duly surrendered for conversion by
the Holders thereof may, at the option of the Company, be deemed, to the fullest
extent permitted by law, acquired by such purchasers from such Holders and
(notwithstanding anything to the contrary contained in Article 11) surrendered
by such purchasers for conversion, all as of immediately prior to the close of
business on the Business Day prior to the Redemption Date, subject to payment of
the above amount as aforesaid. The Trustee shall hold and pay to the Holders
whose Securities are selected for redemption any such amount paid to it for
purchase and conversion in the same manner as it would moneys deposited with it
by the Company for the redemption of Securities. Without the Trustee's prior
written consent, no arrangement between the Company and such purchasers for the
purchase and conversion of any Securities shall increase or otherwise affect any
of the powers, duties, responsibilities or obligations of the Trustee as set
forth in this Indenture, and the Company agrees to indemnify the Trustee from,
and hold it harmless against, any loss, liability or expense arising out of or
in connection with any such arrangement for the purchase and conversion of any
Securities between the Company and such purchasers, including the costs and
expenses incurred by the Trustee in the defense of any claim or liability
arising out of or in connection with the exercise or performance of any of its
powers, duties, responsibilities or obligations under this Indenture.

            SECTION 3.08 Purchase of Securities at Option of the Holder.

            (a) General. Securities shall be purchased by the Company pursuant
to paragraph 6 of the Securities as of June 16, 2008, 2013 and 2018 (each, a
"Purchase Date"), at the purchase price of $397.27 per $1,000 of Principal
Amount at Maturity as of June 16, 2008, of $540.41 per $1,000 of Principal
Amount at Maturity as of June 16, 2013, and of $735.13 per $1,000 of Principal
Amount at Maturity as of June 16, 2018, in each case, plus accrued and unpaid
cash interest, if any, to the Purchase Date (each, a "Purchase Price", as
applicable), at the option of the Holder thereof, upon:

            (1) delivery to the Paying Agent by the Holder of a written notice
      of purchase (a "Purchase Notice") at any time from the opening of business
      on the date that is 20 Business Days prior to a Purchase Date until the
      close of business on the Business Day prior to such Purchase Date stating:

                  (A) the certificate number of the Security which the Holder
            will deliver to be purchased,

                  (B) the portion of the Principal Amount at Maturity of the
            Security which the Holder will deliver to be purchased, which
            portion must be a Principal Amount at Maturity of $1,000 or an
            integral multiple thereof,
<PAGE>
                                      -27-

                  (C) that such Security shall be purchased as of the Purchase
            Date pursuant to the terms and conditions specified in paragraph 6
            of the Securities and in this Indenture, and

                  (D) in the event the Company elects, pursuant to Section
            3.08(b), to pay the Purchase Price to be paid as of such Purchase
            Date, in whole or in part, in shares of Common Stock but such
            portion of the Purchase Price shall ultimately be payable to such
            Holder entirely in cash because any of the conditions to payment of
            the Purchase Price in Common Stock is not satisfied prior to the
            close of business on such Purchase Date, as set forth in Section
            3.08(d), whether such Holder elects (i) to withdraw such Purchase
            Notice as to some or all of the Securities to which such Purchase
            Notice relates (stating the Principal Amount at Maturity and
            certificate numbers of the Securities as to which such withdrawal
            shall relate), or (ii) to receive cash in respect of the entire
            Purchase Price for all Securities (or portions thereof) to which
            such Purchase Notice relates; and

            (2) delivery of such Security to the Paying Agent prior to, on or
      after the Purchase Date (together with all necessary endorsements) at the
      offices of the Paying Agent, such delivery being a condition to receipt by
      the Holder of the Purchase Price therefor; provided, however, that such
      Purchase Price shall be so paid pursuant to this Section 3.08 only if the
      Security so delivered to the Paying Agent shall conform in all respects to
      the description thereof in the related Purchase Notice, as determined by
      the Company.

            If a Holder, in such Holder's Purchase Notice and in any written
notice of withdrawal delivered by such Holder pursuant to the terms of Section
3.10, fails to indicate such Holder's choice with respect to the election set
forth in clause (D) of Section 3.08(a)(1), such Holder shall be deemed to have
elected to receive cash in respect of the Purchase Price for all Securities
subject to such Purchase Notice in the circumstances set forth in such clause
(D).

            The Company shall purchase from the Holder thereof, pursuant to this
Section 3.08, a portion of a Security if the Principal Amount at Maturity of
such portion is $1,000 or an integral multiple of $1,000. Provisions of this
Indenture that apply to the purchase of all of a Security also apply to the
purchase of such portion of such Security.

            Any purchase by the Company contemplated pursuant to the provisions
of this Section 3.08 shall be consummated by the delivery of the consideration
to be received by the Holder (together with accrued and unpaid contingent
interest, if any) promptly following the later of the Purchase Date and the time
of delivery of the Security.

            Notwithstanding anything herein to the contrary, any Holder
delivering to the Paying Agent the Purchase Notice contemplated by this Section
3.08(a) shall have the right to withdraw such Purchase Notice at any time prior
to the close of business on the Business Day prior to the Purchase Date by
delivery of a written notice of withdrawal to the Paying Agent in accordance
with Section 3.10.
<PAGE>
                                      -28-

            The Paying Agent shall promptly notify the Company of the receipt by
it of any Purchase Notice or written notice of withdrawal thereof.

            (b) Company's Right to Elect Manner of Payment of Purchase Price.
The Securities to be purchased pursuant to Section 3.08(a) may be paid for, at
the election of the Company, in U.S. legal tender ("cash") or Common Stock, or
in any combination of cash and Common Stock, subject to the conditions set forth
in Sections 3.08(c) and (d). The Company shall designate, in the Company Notice
delivered pursuant to Section 3.08(e), whether the Company will purchase the
Securities for cash or Common Stock, or, if a combination thereof, the
percentages or amounts of the Purchase Price of Securities in respect of which
it will pay in cash or Common Stock; provided that the Company will pay cash for
fractional interests in Common Stock. For purposes of determining the existence
of potential fractional interests, all Securities subject to purchase by the
Company held by a Holder shall be considered together (no matter how many
separate certificates are to be presented). Each Holder whose Securities are
purchased pursuant to this Section 3.08 shall receive the same percentage of
cash or Common Stock in payment of the Purchase Price for such Securities,
except (i) as provided in Section 3.08(d) with regard to the payment of cash in
lieu of fractional shares of Common Stock and (ii) in the event that the Company
is unable to purchase the Securities of a Holder or Holders of Common Stock
because any necessary qualifications or registrations of the Common Stock under
applicable state securities laws cannot be obtained, the Company may purchase
the Securities of such Holder or Holders for cash. The Company may not change
its election with respect to the consideration (or components or percentages of
components thereof) to be paid once the Company has given its Company Notice to
Securityholders except pursuant to this Section 3.08(b) or pursuant to Section
3.08(d) in the event of a failure to satisfy, prior to the close of business on
the Purchase Date, any condition to the payment of the Purchase Price, in whole
or in part, in Common Stock.

            At least three Business Days before the Company Notice Date, the
Company shall deliver an Officers' Certificate to the Trustee specifying:

            (i) the manner of payment selected by the Company,

            (ii) the information required by Section 3.08(e),

            (iii) if the Company elects to pay the Purchase Price, or a
specified percentage thereof, in Common Stock, that the conditions to such
manner of payment set forth in Section 3.08(d) have been or will be complied
with, and

            (iv) whether the Company desires the Trustee to give the Company
Notice required by Section 3.08(e).

            (c) Purchase with Cash. On each Purchase Date, at the option of the
Company, the Purchase Price of Securities in respect of which a Purchase Notice
pursuant to Section 3.08(a) has been given and not withdrawn, or a specified
percentage thereof, may be paid by the
<PAGE>
                                      -29-

Company with cash equal to the aggregate Purchase Price of such Securities. If
the Company elects to purchase Securities with cash, the Company Notice, as
provided in Section 3.08(e), shall be sent to Holders not less than 20 Business
Days prior to such Purchase Date (the "Company Notice Date").

            (d) Payment by Issuance of Common Stock. On each Purchase Date, at
the option of the Company, the Purchase Price of Securities in respect of which
a Purchase Notice pursuant to Section 3.08(a) has been given, or a specified
percentage thereof, may be paid by the Company by the issuance of a number of
shares of Common Stock equal to the quotient obtained by dividing (i) the amount
of cash to which the Securityholders would have been entitled had the Company
elected to pay all or such specified percentage, as the case may be, of the
Purchase Price of such Securities in cash by (ii) the Market Price of a share of
Common Stock, subject to the next succeeding paragraph.

            The Company will not issue a fractional share of Common Stock in
payment of the Purchase Price. Instead the Company will pay cash for the current
market value of the fractional share. The current market value of a fraction of
a share shall be determined by multiplying the Market Price by such fraction and
rounding the product to the nearest whole cent. It is understood that if a
Holder elects to have more than one Security purchased, the number of shares of
Common Stock shall be based on the aggregate amount of Securities to be
purchased.

            Upon a payment by Common Stock pursuant to the terms hereof, that
portion of accrued Original Issue Discount or cash interest attributable to the
period from the Issue Date to the Purchase Date with respect to the purchased
Security shall not be cancelled, extinguished or forfeited but rather shall be
deemed paid in full to the Holder through the delivery of the Common Stock in
exchange for the Security being purchased pursuant to the terms hereof, and the
fair market value of such Common Stock (together with any cash payments in lieu
of fractional shares of Common Stock) shall be treated as issued, to the extent
thereof, first in exchange for the accrued Original Issue Discount or cash
interest through the Purchase Date, and the balance, if any, of the fair market
value of such shares of Common Stock shall be treated as issued in exchange for
the Issue Price of the Security being purchased pursuant to the provisions
hereof.

            If the Company elects to purchase the Securities by the issuance of
shares of Common Stock, the Company Notice, as provided in Section 3.08(e),
shall be sent to the Holders not later than the Company Notice Date.

            The Company's right to exercise its election to purchase the
Securities pursuant to this Section 3.08 through the issuance of shares of
Common Stock shall be conditioned upon:

            (i) the Company's not having given its Company Notice of an election
      to pay entirely in cash and its giving of timely Company Notice of
      election to purchase all or a specified percentage of the Securities with
      Common Stock as provided herein;
<PAGE>
                                      -30-

            (ii) the shares of Common Stock having been admitted for listing or
      admitted for listing subject to notice of issuance on the Nasdaq National
      Market or a national securities exchange on which the Common Stock is then
      listed or, if the Common Stock is not then listed on a national or
      regional securities exchange, as quoted on the National Association of
      Securities Dealers Automated Quotation System;

            (iii) the registration of the shares of Common Stock to be issued in
      respect of the payment of the Purchase Price under the Securities Act of
      1933, as amended (the "Securities Act"), or the Securities Exchange Act of
      1934, as amended (the "Exchange Act"), in each case, if required;

            (iv) any necessary qualification or registration under applicable
      state securities laws or the availability of an exemption from such
      qualification and registration; and

            (v) the receipt by the Trustee of an Officers' Certificate and an
      Opinion of Counsel each stating that (A) the terms of the issuance of the
      Common Stock are in conformity with this Indenture and (B) the shares of
      Common Stock to be issued by the Company in payment of the Purchase Price
      in respect of Securities have been duly authorized and, when issued and
      delivered pursuant to the terms of this Indenture in payment of the
      Purchase Price in respect of the Securities, will be validly issued, fully
      paid and non-assessable and, to the best of such counsel's knowledge, free
      from preemptive rights under law or material contracts, and, in the case
      of such Officers' Certificate, stating that conditions (i), (ii), (iii)
      and (iv) above and the condition set forth in the second succeeding
      sentence have been satisfied and, in the case of such Opinion of Counsel,
      stating that conditions (ii) and (iii) above have been satisfied.

            Such Officers' Certificate shall also set forth the number of shares
of Common Stock to be issued for each $1,000 Principal Amount at Maturity of
Securities and the Sale Price of a share of Common Stock on each trading day
during the period for which the Market Price is calculated. The Company may pay
the Purchase Price (or any portion thereof) in Common Stock only if the
information necessary to calculate the Market Price is published in a daily
newspaper of national circulation. If the foregoing conditions are not satisfied
with respect to a Holder or Holders prior to the close of business on the
Purchase Date and the Company has elected to purchase the Securities pursuant to
this Section 3.08 through the issuance of shares of Common Stock, the Company
shall pay the entire Purchase Price of the Securities of such Holder or Holders
in cash.

            The "Market Price" of the Common Stock means the average of the Sale
Prices of the Common Stock for the five trading day period ending on the third
Business Day (if the third Business Day prior to the applicable Purchase Date is
a trading day or, if not, then on the last trading day) prior to the applicable
Purchase Date, appropriately adjusted to take into account the occurrence,
during the period commencing on the first of such trading days during such five
trading day period and ending on such Purchase Date, of any event described in
Section 11.06, 11.07 or 11.08; subject, however, to the conditions set forth in
Sections 11.09 and 11.10.
<PAGE>
                                      -31-

            (e) Notice of Election. The Company's notice of election to purchase
with cash or Common Stock or any combination thereof shall be sent to the
Holders (and to beneficial owners as required by applicable law) in the manner
provided in Section 14.02 at the time specified in Section 3.08(c) or (d), as
applicable (the "Company Notice"). Such Company Notice shall state the manner of
payment elected and shall contain the following information:

            In the event the Company has elected to pay the Purchase Price (or a
specified percentage thereof) with Common Stock, the Company Notice shall:

            (1) state that each Holder will receive Common Stock with a Market
      Price determined as of a specified date prior to the Purchase Date equal
      to such specified percentage of the Purchase Price of the Securities held
      by such Holder (except any cash amount to be paid in lieu of fractional
      shares);

            (2) set forth the method of calculating the Market Price of the
      Common Stock; and

            (3) state that because the Market Price of Common Stock will be
      determined prior to the Purchase Date, Holders will bear the market risk
      with respect to the value of the Common Stock to be received from the date
      such Market Price is determined to the Purchase Date.

            In any case, each Company Notice shall include a form of Purchase
Notice to be completed by a Securityholder and shall state:

            (i) the Purchase Price, the Conversion Rate and accrued and unpaid
      cash interest, if any, that will be accrued and payable with respect to
      the Securities as of the Purchase Date;

            (ii) whether the Company will pay the Purchase Price in cash or in
      Common Stock or any combination thereof, specifying the percentage of
      each;

            (iii) the name and address of the Paying Agent and the Conversion
      Agent;

            (iv) that Securities as to which a Purchase Notice has been given
      may be converted pursuant to Article 11 hereof only if the applicable
      Purchase Notice has been withdrawn in accordance with the terms of this
      Indenture;

            (v) that Securities must be surrendered to the Paying Agent to
      collect payment of the Purchase Price and interest, if any;

            (vi) that the Purchase Price for any Security as to which a Purchase
      Notice has been given and not withdrawn, together with any cash interest
      payable with respect
<PAGE>
                                      -32-

      thereto, will be paid promptly following the later of the Purchase Date
      and the time of surrender of such Security as described in (v);

            (vii) the procedures the Holder must follow to exercise rights under
      Section 3.08 and a brief description of those rights;

            (viii) briefly, the conversion rights of the Securities and that
      Holders who want to convert Securities must satisfy the requirements set
      forth in paragraph 8 of the Securities;

            (ix) the procedures for withdrawing a Purchase Notice (including,
      without limitation, for a conditional withdrawal pursuant to the terms of
      Section 3.08(a)(1)(D) or Section 3.10);

            (x) that, unless the Company defaults in making payment of such
      Purchase Price and cash interest, if any, Original Issue Discount and cash
      interest, if any, on Securities surrendered for purchase will cease to
      accrue on and after the Purchase Date; and

            (xi) the CUSIP number of the Securities.

            At the Company's request, the Trustee shall give such Company Notice
in the Company's name and at the Company's expense; provided, however, that, in
all cases, the text of such Company Notice shall be prepared by the Company.

            Upon determination of the actual number of shares of Common Stock to
be issued for each $1,000 Principal Amount at Maturity of Securities, the
Company will issue a press release and publish such determination on the
Company's web site on the World Wide Web.

            (f) Covenants of the Company. All shares of Common Stock delivered
upon purchase of the Securities shall be newly issued shares or treasury shares,
shall be duly authorized, validly issued, fully paid and nonassessable and shall
be free from preemptive rights and free of any lien or adverse claim created by
the Company.

            The Company shall use its reasonable efforts to list or cause to
have quoted any shares of Common Stock to be issued on the Nasdaq National
Market or the principal United States securities exchange or over-the-counter or
other domestic market on which any other shares of the Common Stock are then
listed or quoted. The Company will promptly inform the Trustee in writing of any
such listing.

            (g) Procedure upon Purchase. The Company shall deposit cash (in
respect of a cash purchase under Section 3.08(c) or for fractional interests as
applicable) or shares of Common Stock, or a combination thereof, as applicable,
at the time and in the manner as provided in Section 3.11, sufficient to pay the
aggregate Purchase Price of, and any accrued and unpaid contingent interest with
respect to all Securities to be purchased pursuant to this Section 3.08. As
<PAGE>
                                      -33-

soon as practicable after the Purchase Date, the Company shall deliver to each
Holder entitled to receive Common Stock through the Paying Agent, a certificate
for the number of full shares of Common Stock issuable in payment of the
Purchase Price and cash in lieu of any fractional interests. The person in whose
name the certificate for Common Stock is registered shall be treated as a holder
of record of shares of Common Stock on the Business Day following the Purchase
Date. Subject to Section 3.08(d), no payment or adjustment will be made for
dividends on the Common Stock the record date for which occurred on or prior to
the Purchase Date.

            (h) Taxes. If a Holder of a Security is paid in Common Stock, the
Company shall pay any documentary, stamp or similar issue or transfer tax due on
such issue of shares of Common Stock. However, the Holder shall pay any such tax
which is due because the Holder requests the shares of Common Stock to be issued
in a name other than the Holder's name. The Paying Agent may refuse to deliver
the certificates representing the Common Stock being issued in a name other than
the Holder's name until the Paying Agent receives a sum sufficient to pay any
tax which will be due because the shares of Common Stock are to be issued in a
name other than the Holder's name. Nothing herein shall preclude any income tax
withholding required by law or regulations.

            SECTION 3.09 Purchase of Securities at Option of the Holder upon
Change in Control.

            (a) If there shall have occurred a Change in Control, Securities
shall be purchased by the Company, at the option of the Holder thereof, at a
purchase price specified in paragraph 6 of the Securities (the "Change in
Control Purchase Price"), as of the date that is no later than 30 Business Days
after the occurrence of the Change in Control but in no event prior to the date
on which such Change in Control occurs (the "Change in Control Purchase Date"),
subject to satisfaction by or on behalf of the Holder of the requirements set
forth in Section 3.09(c).

            A "Change in Control" means the occurrence of any of the following:
(a) the sale, lease, transfer, conveyance or other disposition (other than by
way of merger or consolidation), in one or a series of related transactions, of
all or substantially all of the assets of the Company and its subsidiaries,
taken as a whole, to any "person" or "group" (as such terms are used in Section
13(d) of the Exchange Act), (b) the adoption of a plan relating to the
liquidation or dissolution of the Company, (c) the consummation of any
transaction (including, without limitation, any merger or consolidation) the
result of which is that any "person" or "group" (as such terms are used in
Section 13(d) of the Exchange Act) becomes the "beneficial owner" (as such term
is defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act), directly or
indirectly through one or more intermediaries, of more than 35% of the voting
power of the outstanding voting stock of the Company, or (d) the first day on
which more than a majority of the members of the Board of Directors of the
Company are not Continuing Directors.

            "Continuing Directors" means, as of any date of determination, any
member of the Board of Directors of the Company who (a) was a member of the
Board of Directors of the Company on June 16, 2003 or (b) was nominated for
election to the Board of Directors of the
<PAGE>
                                      -34-

Company with the approval of, or whose election to the Board of Directors of the
Company was ratified by, at least a majority of the Continuing Directors who
were members of the Board of Directors of the Company at the time of such
nomination or election.

            (b) Within 15 Business Days after the occurrence of a Change in
Control, the Company shall mail a written notice of Change in Control by
first-class mail to the Trustee and to each Holder (and to beneficial owners as
required by applicable law). The notice shall include a form of Change in
Control Purchase Notice to be completed by the Securityholder and shall state:

            (1) briefly, the events causing a Change in Control and the date of
      such Change in Control;

            (2) the date by which the Change in Control Purchase Notice pursuant
      to this Section 3.09 must be given;

            (3) the Change in Control Purchase Date;

            (4) the Change in Control Purchase Price and, to the extent known at
      the time of such notice, the amount of interest, if any, that will be
      accrued and payable with respect to the Securities as of the Change in
      Control Purchase Date;

            (5) the name and address of the Paying Agent and the Conversion
      Agent;

            (6) the Conversion Rate and any adjustments thereto resulting from
      the Change in Control;

            (7) that Securities as to which a Change in Control Purchase Notice
      has been given may be converted pursuant to Article 11 hereof only if the
      Change in Control Purchase Notice has been withdrawn in accordance with
      the terms of this Indenture;

            (8) that Securities must be surrendered to the Paying Agent to
      collect payment of the Change in Control Purchase Price and accrued and
      unpaid cash interest, if any;

            (9) that the Change in Control Purchase Price for any Security as to
      which a Change in Control Purchase Notice has been duly given and not
      withdrawn, together with any accrued interest payable with respect
      thereto, will be paid promptly following the later of the Change in
      Control Purchase Date and the time of surrender of such Security as
      described in (8);

            (10) briefly, the procedures the Holder must follow to exercise
      rights under this Section 3.09;

            (11) briefly, the conversion rights of the Securities;
<PAGE>
                                      -35-

            (12) the procedures for withdrawing a Change in Control Purchase
      Notice;

            (13) that, unless the Company defaults in making payment of such
      Change in Control Purchase Price and contingent interest, if any on
      Securities surrendered for purchase, Original Issue Discount or cash
      interest on Securities surrendered for purchase will cease to accrue on
      and after the Change in Control Purchase Date; and

            (14) the CUSIP number of the Securities.

            (c) A Holder may exercise its rights specified in Section 3.09(a)
upon delivery of a written notice of purchase (a "Change in Control Purchase
Notice") to the Paying Agent at any time prior to the close of business on the
Change in Control Purchase Date, stating:

            (1) the certificate number of the Security which the Holder will
      deliver to be purchased;

            (2) the portion of the Principal Amount at Maturity of the Security
      which the Holder will deliver to be purchased, which portion must be
      $1,000 or an integral multiple thereof; and

            (3) that such Security shall be purchased pursuant to the terms and
      conditions specified in paragraph 6 of the Securities.

            The delivery of such Security to the Paying Agent prior to, on or
after the Change in Control Purchase Date (together with all necessary
endorsements) at the offices of the Paying Agent shall be a condition to the
receipt by the Holder of the Change in Control Purchase Price therefor;
provided, however, that such Change in Control Purchase Price shall be so paid
pursuant to this Section 3.09 only if the Security so delivered to the Paying
Agent shall conform in all respects to the description thereof set forth in the
related Change in Control Purchase Notice.

            The Company shall purchase from the Holder thereof, pursuant to this
Section 3.09, a portion of a Security if the Principal Amount at Maturity of
such portion is $1,000 or an integral multiple of $1,000. Provisions of this
Indenture that apply to the purchase of all of a Security also apply to the
purchase of such portion of such Security.

            Any purchase by the Company contemplated pursuant to the provisions
of this Section 3.09 shall be consummated by the delivery of the consideration
to be received by the Holder (together with accrued and unpaid interest, if any)
promptly following the later of the Change in Control Purchase Date and the time
of delivery of the Security to the Paying Agent in accordance with this Section
3.09.

            Notwithstanding anything herein to the contrary, any Holder
delivering to the Paying Agent the Change in Control Purchase Notice
contemplated by this Section 3.09(c) shall have the right to withdraw such
Change in Control Purchase Notice at any time prior to the close
<PAGE>
                                      -36-

of business on the Business Day prior to the Change in Control Purchase Date by
delivery of a written notice of withdrawal to the Paying Agent in accordance
with Section 3.10.

            The Paying Agent shall promptly notify the Company of the receipt by
it of any Change in Control Purchase Notice or written withdrawal thereof.

            The Company shall not be required to comply with this Section 3.09
if a third party mails a written notice of Change in Control in the manner, at
the times and otherwise in compliance with this Section 3.09 and repurchases all
Securities for which a Change in Control Purchase Notice shall be delivered and
not withdrawn.

            SECTION 3.10 Effect of Purchase Notice or Change in Control Purchase
Notice. Upon receipt by the Paying Agent of the Purchase Notice or Change in
Control Purchase Notice specified in Section 3.08(a) or Section 3.09(c), as
applicable, the Holder of the Security in respect of which such Purchase Notice
or Change in Control Purchase Notice, as the case may be, was given shall
(unless such Purchase Notice or Change in Control Purchase Notice is withdrawn
as specified in the following two paragraphs) thereafter be entitled to receive
solely the Purchase Price or Change in Control Purchase Price, as the case may
be, and any accrued and unpaid interest, with respect to such Security. Such
Purchase Price or Change in Control Purchase Price and any accrued and unpaid
cash interest, if any, shall be paid to such Holder, subject to receipt of funds
and/or securities by the Paying Agent, promptly following the later of (x) the
Purchase Date or the Change in Control Purchase Date, as the case may be, with
respect to such Security (provided the conditions in Section 3.08(a) or Section
3.09(c), as applicable, have been satisfied) and (y) the time of delivery of
such Security to the Paying Agent by the Holder thereof in the manner required
by Section 3.08(a) or Section 3.09(c), as applicable. Securities in respect of
which a Purchase Notice or Change in Control Purchase Notice, as the case may
be, has been given by the Holder thereof may not be converted pursuant to
Article 11 hereof on or after the date of the delivery of such Purchase Notice
or Change in Control Purchase Notice, as the case may be, unless such Purchase
Notice or Change in Control Purchase Notice, as the case may be, has first been
validly withdrawn as specified in the following two paragraphs.

            A Purchase Notice or Change in Control Purchase Notice, as the case
may be, may be withdrawn by means of a written notice of withdrawal delivered to
the office of the Paying Agent in accordance with the Purchase Notice or Change
in Control Purchase Notice, as the case may be, at any time prior to the close
of business on the Business Day prior to the Purchase Date or the Change in
Control Purchase Date, as the case may be, specifying:

            (1) the certificate number of the Security in respect of which such
      notice of withdrawal is being submitted,

            (2) the Principal Amount at Maturity of the Security with respect to
      which such notice of withdrawal is being submitted, and
<PAGE>
                                      -37-

            (3) the Principal Amount at Maturity, if any, of such Security which
      remains subject to the original Purchase Notice or Change in Control
      Purchase Notice, as the case may be, and which has been or will be
      delivered for purchase by the Company.

            A written notice of withdrawal of a Purchase Notice may be in the
form set forth in the preceding paragraph or may be in the form of (i) a
conditional withdrawal contained in a Purchase Notice pursuant to the terms of
Section 3.08(a)(1)(D) or (ii) a conditional withdrawal containing the
information set forth in Section 3.08(a)(1)(D) and the preceding paragraph and
contained in a written notice of withdrawal delivered to the Paying Agent as set
forth in the preceding paragraph.

            There shall be no purchase of any Securities pursuant to Section
3.08 (other than through the issuance of Common Stock in payment of the Purchase
Price, including cash in lieu of fractional shares) or 3.09 if there has
occurred (prior to, on or after, as the case may be, the giving, by the Holders
of such Securities, of the required Purchase Notice or Change in Control
Purchase Notice, as the case may be) and is continuing an Event of Default
(other than a default in the payment of the Purchase Price or Change in Control
Purchase Price, as the case may be, and any accrued and unpaid cash interest
with respect to such Securities). The Paying Agent will promptly return to the
respective Holders thereof any Securities (x) with respect to which a Purchase
Notice or Change in Control Purchase Notice, as the case may be, has been
withdrawn in compliance with this Indenture, or (y) held by it during the
continuance of an Event of Default (other than a default in the payment of the
Purchase Price or Change in Control Purchase Price, as the case may be, and any
accrued and unpaid cash interest with respect to such Securities) in which case,
upon such return, the Purchase Notice or Change in Control Purchase Notice with
respect thereto shall be deemed to have been withdrawn.

            SECTION 3.11 Deposit of Purchase Price or Change in Control Purchase
Price. Prior to 10:00 a.m., New York City time, on the Business Day following
the Purchase Date or the Change in Control Purchase Date, as the case may be,
the Company shall deposit with the Trustee or with the Paying Agent (or, if the
Company or a Subsidiary or an Affiliate of either of them is acting as the
Paying Agent, shall segregate and hold in trust as provided in Section 2.04) an
amount of money (in immediately available funds if deposited on such Business
Day) or Common Stock, if permitted hereunder, sufficient to pay the aggregate
Purchase Price or Change in Control Purchase Price, as the case may be, of, and
any accrued and unpaid cash interest with respect to, all the Securities or
portions thereof which are to be purchased as of the Purchase Date or Change in
Control Purchase Date, as the case may be.

            SECTION 3.12 Securities Purchased in Part. Any Security which is to
be purchased only in part shall be surrendered at the office of the Paying Agent
(with, if the Company or the Trustee so requires, due endorsement by, or a
written instrument of transfer in form satisfactory to the Company and the
Trustee duly executed by, the Holder thereof or such Holder's attorney duly
authorized in writing) and the Company shall execute and the Trustee shall
authenticate and deliver to the Holder of such Security, without service charge,
a new Security or Securities,
<PAGE>
                                      -38-

of any authorized denomination as requested by such Holder in aggregate
Principal Amount at Maturity equal to, and in exchange for, the portion of the
Principal Amount at Maturity of the Security so surrendered which is not
purchased.

            SECTION 3.13 Repayment to the Company. The Trustee and the Paying
Agent shall promptly return to the Company any cash or shares of Common Stock
that remain unclaimed as provided in paragraph 14 of the Securities, together
with interest or dividends, if any, thereon (subject to the provisions of
Section 7.01(f)), held by them for the payment of the Purchase Price or Change
in Control Purchase Price, as the case may be, or contingent interest, if any;
provided, however, that to the extent that the aggregate amount of cash or
shares of Common Stock deposited by the Company pursuant to Section 3.11 exceeds
the aggregate Purchase Price or Change in Control Purchase Price, as the case
may be, of, and the accrued and unpaid contingent interest with respect to, the
Securities or portions thereof which the Company is obligated to purchase as of
the Purchase Date or Change in Control Purchase Date, as the case may be,
whether as a result of withdrawal or otherwise, then promptly after the Business
Day following the Purchase Date or Change in Control Purchase Date, as the case
may be, the Trustee shall return any such excess to the Company together with
interest or dividends, if any, thereon (subject to the provisions of Section
7.01(f)).

                                    ARTICLE 4

                                    COVENANTS

            SECTION 4.01 Payment of Securities. The Company shall promptly make
all payments in respect of the Securities on the dates and in the manner
provided in the Securities or pursuant to this Indenture. Any amounts to be
given to the Trustee or Paying Agent, shall be deposited with the Trustee or
Paying Agent by 10:00 a.m., New York City time on the payment date, by the
Company. Principal Amount at Maturity, Restated Principal Amount, Issue Price
plus accrued Original Issue Discount, Redemption Price, Purchase Price, Change
in Control Purchase Price, and cash interest shall be considered paid on the
applicable date due if on such date (or, in the case of a Purchase Price or
Change in Control Purchase Price, on the Business Day following the applicable
Purchase Date or Change in Control Purchase Date, as the case may be) the
Trustee or the Paying Agent holds, in accordance with this Indenture, money or
securities, if permitted hereunder, sufficient to pay all such amounts then due.

      The Company shall, to the extent permitted by law, pay cash interest on
overdue amounts at the rate per annum set forth in paragraph 1 of the
Securities, compounded semiannually, which interest shall accrue from the date
such overdue amount was originally due to the date payment of such amount,
including interest thereon, has been made or duly provided for. All such
interest shall be payable on demand. The accrual of such interest on overdue
amounts shall be in lieu of, and not in addition to, the continued accrual of
Original Issue Discount.

            SECTION 4.02 SEC and Other Reports. The Company shall deliver to the
Trustee, within 15 days after it files such annual and quarterly reports,
information, documents

<PAGE>
                                      -39-

and other reports with the SEC, copies of its annual report and of the
information, documents and other reports (or copies of such portions of any of
the foregoing as the SEC may by rules and regulations prescribe) which the
Company is required to file with the SEC pursuant to Section 13 or 15(d) of the
Exchange Act. The Company also shall comply with the provisions of TIA Section
314(a). Delivery of such reports, information and documents to the Trustee is
for informational purposes only and the Trustee's receipt of the same shall not
constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Company's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).

            SECTION 4.03 Compliance Certificate. The Company shall deliver to
the Trustee within 120 days after the end of each fiscal year of the Company
(beginning with the fiscal year ending on September 30, 2003) an Officers'
Certificate, stating whether or not to the best knowledge of the signers thereof
the Company is in default in the performance and observance of any of the terms,
provisions and conditions of this Indenture (without regard to any period of
grace or requirement of notice provided hereunder) and if the Company shall be
in default, specifying all such defaults and the nature and status thereof of
which they may have knowledge.

            SECTION 4.04 Further Instruments and Acts. Upon request of the
Trustee, the Company will execute and deliver such further instruments and do
such further acts as may be reasonably necessary or proper to carry out more
effectively the purposes of this Indenture.

            SECTION 4.05 Maintenance of Office or Agency. The Company will
maintain in the Borough of Manhattan, The City of New York, an office or agency
of the Trustee, Registrar, Paying Agent and Conversion Agent where Securities
may be presented or surrendered for payment, where Securities may be surrendered
for registration of transfer, exchange, purchase, redemption or conversion and
where notices and demands to or upon the Company in respect of the Securities
and this Indenture may be served. The office of the Trustee, located at 100 Wall
Street, Suite 1600, New York, NY 10005 (Attention: Corporate Trust Services),
shall initially be such office or agency for all of the aforesaid purposes. The
Company shall give prompt written notice to the Trustee of the location, and of
any change in the location, of any such office or agency (other than a change in
the location of the office of the Trustee). If at any time the Company shall
fail to maintain any such required office or agency or shall fail to furnish the
Trustee with the address thereof, such presentations, surrenders, notices and
demands may be made or served at the address of the Trustee set forth in Section
14.02.

      The Company may also from time to time designate one or more other offices
or agencies where the Securities may be presented or surrendered for any or all
such purposes and may from time to time rescind such designations; provided,
however, that no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency in the Borough of
Manhattan, The City of New York, for such purposes.

<PAGE>

                                      -40-

            SECTION 4.06 Delivery of Certain Information. At any time when the
Company is not subject to Section 13 or 15(d) of the Exchange Act, upon the
request of a Holder or any beneficial holder of Securities or shares of Common
Stock which are restricted securities issued upon conversion thereof, the
Company will promptly furnish or cause to be furnished Rule 144A Information (as
defined below) to such Holder or any beneficial holder of Securities or holder
of shares of Common Stock issued upon conversion of Securities, or to a
prospective purchaser of any such security designated by any such holder, as the
case may be, to the extent required to permit compliance by such Holder or
holder with Rule 144A under the Securities Act in connection with the resale of
any such security. "Rule 144A Information" shall be such information as is
specified pursuant to Rule 144A(d)(4) under the Securities Act.

            SECTION 4.07 Limitation on Guarantees of Indebtedness by
Subsidiaries. The Company will not permit any Subsidiary to guarantee the
payment of any Debt of the Company unless such Subsidiary simultaneously
executes and delivers a supplemental indenture to the indenture providing for a
Guarantee of the Securities by such Subsidiary to the extent required in Article
13 hereof.

            SECTION 4.08 Covenant to Comply with Securities Laws upon Purchase
of Securities. In connection with any offer to purchase or purchase of
Securities under Section 3.08 or 3.09 hereof (provided that such offer or
purchase constitutes an "Issuer Tender Offer" for purposes of Rule 13e-4 (which
term, as used herein, includes any successor provision thereto) under the
Exchange Act at the time of such offer or purchase), the Company shall to the
extent applicable (i) comply with Rule 13e-4 and Rule 14e-1 under the Exchange
Act, (ii) file the related Schedule TO (or any successor schedule, form or
report) under the Exchange Act, and (iii) otherwise comply with all Federal and
state securities laws so as to permit the rights and obligations under Sections
3.08 and 3.09 to be exercised in the time and in the manner specified in
Sections 3.08 and 3.09.

                                   ARTICLE 5

                              SUCCESSOR CORPORATION

            SECTION 5.01 When Company May Merge or Transfer Assets. The Company
shall not consolidate with or merge with or into any other person or convey,
transfer or lease all or substantially all of its properties and assets to any
person, nor will the Company permit any Subsidiary to enter into any such
transaction or series of transactions if such transaction or series of
transactions, in the aggregate, would result in a sale, assignment, transfer,
lease or other disposition of all or substantially all of the properties and
assets of the Company and its Subsidiaries on a consolidated basis to any other
person or persons, unless:

            (a) either (1) the Company or such subsidiary shall be the surviving
      corporation or (2) the person (if other than the Company) formed by such
      consolidation or into which the Company or such Subsidiary is merged or
      the person which acquires by conveyance, transfer or lease the properties
      and assets of the Company or such Subsidiary
<PAGE>
                                      -41-

      substantially as an entirety (i) shall be organized and validly existing
      under the laws of the United States or any state thereof or the District
      of Columbia and (ii) shall expressly assume, by an indenture supplemental
      hereto, executed and delivered to the Trustee, in form reasonably
      satisfactory to the Trustee, all of the obligations of the Company or such
      Subsidiary under the Securities and this Indenture;

            (b) immediately after giving effect to such transaction, no Default
      shall have occurred and be continuing; and

            (c) the Company shall have delivered to the Trustee an Officers'
      Certificate and an Opinion of Counsel, each stating that such
      consolidation, merger, conveyance, transfer or lease and, if a
      supplemental indenture is required in connection with such transaction,
      such supplemental indenture, comply with this Article 5 and that all
      conditions precedent herein provided for relating to such transaction have
      been satisfied.

            For purposes of the foregoing, the transfer (by lease, assignment,
sale or otherwise) of the properties and assets of one or more Subsidiaries
(other than to the Company or another Subsidiary), which, if such assets were
owned by the Company, would constitute all or substantially all of the
properties and assets of the Company, shall be deemed to be the transfer of all
or substantially all of the properties and assets of the Company.

            The successor person formed by such consolidation or into which the
Company or the applicable Subsidiary is merged or the successor person to which
such conveyance, transfer or lease is made shall succeed to, and be substituted
for, and may exercise every right and power of, the Company or the applicable
Subsidiary under this Indenture with the same effect as if such successor had
been named as the Company or the applicable Subsidiary herein; and thereafter,
except in the case of a lease and any obligations the Company or the applicable
Subsidiary may have under a supplemental indenture pursuant to Section 11.14,
the Company or the applicable Subsidiary shall be discharged from all
obligations and covenants under this Indenture and the Securities. Subject to
Section 9.06, the Company, the applicable Subsidiary, the Trustee and the
successor person shall enter into a supplemental indenture to evidence the
succession and substitution of such successor person and such discharge and
release of the Company and the applicable Subsidiary.

            A Guarantor shall not consolidate with or merge into any Person or
convey, transfer or lease its properties and assets substantially as an entity
to another Person unless the surviving Person assumes the obligations of such
Guarantor and the surviving Person is a corporation organized and existing under
the laws of the United States, any state thereof or the District of Columbia,
except if all of the assets or all of the common stock of such Guarantor is sold
to a non-affiliate of the Company, in which case the Guarantee is released.
<PAGE>
                                      -42-

                                   ARTICLE 6

                              DEFAULTS AND REMEDIES

            SECTION 6.01 Events of Default. An "Event of Default" occurs if:

            (1) the Company defaults in payment of any interest when due under
      the Securities and such default continues for 30 days;

            (2) the Company defaults in the payment of the Principal Amount at
      Maturity (or, if the Securities have been converted to semiannual coupon
      notes following a Tax Event pursuant to Section 10.01 of the Indenture,
      the Restated Principal Amount), Issue Price plus accrued Original Issue
      Discount or cash interest, Redemption Price, Purchase Price or Change in
      Control Purchase Price on any Security when the same becomes due and
      payable at its Stated Maturity, upon redemption, upon declaration, when
      due for purchase by the Company or otherwise;

            (3) the Company fails to comply with any of its agreements in the
      Security or this Indenture (other than those referred to in clauses (1)
      and (2) above) and such failure continues for 60 days after receipt by the
      Company of a Notice of Default;

            (4) default under any Debt, whether such Debt now exists or is
      created later, which default results in such Debt becoming or being
      declared due and payable prior to the date on which it would otherwise
      have become due and payable, and the principal amount of all Debt so
      accelerated, together with all Debt due and payable but not paid prior to
      the end of any grace period, is $10,000,000 or more, and such acceleration
      has not been rescinded or annulled within a period of 10 days after
      receipt by the Company of a Notice of Default from the Trustee; provided,
      however, that if any such default shall be cured, waived, rescinded or
      annulled, then the Event of Default by reason thereof shall be deemed not
      to have occurred;

            (5) any Guarantee ceases to be in full force and effect or is
      declared null and void or any Guarantor denies that it has any further
      liability under any Guarantee, or gives notice to such effect (other than
      by reason of the termination of this Indenture or the release of any such
      Guarantee in accordance with this Indenture) and such condition shall have
      continued for a period of 30 days after written notice of such failure
      requiring the Guarantor and the Company to remedy the same shall have been
      given (x) to the Company by the Trustee or (y) to the Company and the
      Trustee by the holders of 25% in aggregate principal amount of the
      Securities then outstanding;

            (6) the Company pursuant to or under or within the meaning of any
      Bankruptcy Law:

                  (A) commences a voluntary case or proceeding;
<PAGE>
                                      -43-

                  (B) consents to the entry of an order for relief against it in
            an involuntary case or proceeding or the commencement of any case
            against it;

                  (C) consents to the appointment of a Custodian of it or for
            any substantial part of its property;

                  (D) makes a general assignment for the benefit of its
            creditors;

                  (E) files a petition in bankruptcy or answer or consent
            seeking reorganization or relief; or

                  (F) consents to the filing of such petition or the appointment
            of or taking possession by a Custodian; or

            (7) a court of competent jurisdiction enters an order or decree
      under any Bankruptcy Law that:

                  (A) is for relief against the Company in an involuntary case
            or proceeding, or adjudicates the Company insolvent or bankrupt;

                  (B) appoints a Custodian of the Company or for any substantial
            part of its property; or

                  (C) orders the winding up or liquidation of the Company;

            and the order or decree remains unstayed and in effect for 60 days.

            "Bankruptcy Law" means Title 11, United States Code, or any similar
Federal or state law for the relief of debtors.

            "Custodian" means any receiver, trustee, assignee, liquidator,
custodian or similar official under any Bankruptcy Law.

            A Default under clause (3) or clause (4) above is not an Event of
Default until the Trustee notifies the Company, or the Holders of at least 25%
in aggregate Principal Amount at Maturity of the Securities at the time
outstanding notify the Company and the Trustee, of the Default and the Company
does not cure such Default (and such Default is not waived) within the time
specified in clause (3) or clause (4) above after actual receipt of such notice.
Any such notice must specify the Default, demand that it be remedied and state
that such notice is a "Notice of Default".

            The Company shall deliver to the Trustee, within 30 days after it
becomes aware of the occurrence thereof, written notice of any event which with
the giving of notice or the lapse of time, or both, would become an Event of
Default under clause (3) or clause (4) above, its status and what action the
Company is taking or proposes to take with respect thereto.
<PAGE>
                                      -44-

            SECTION 6.02 Acceleration. If an Event of Default (other than an
Event of Default specified in Section 6.01(6) or (7) in respect of the Company)
occurs and is continuing, the Trustee by written notice to the Company, or the
Holders of at least 25% in aggregate Principal Amount at Maturity of the
Securities at the time outstanding by notice to the Company and the Trustee, may
declare the Issue Price plus accrued Original Issue Discount or cash interest
(or if the Securities have been converted to semiannual coupon notes following a
Tax Event, the Restated Principal Amount, plus accrued interest) through the
date of declaration on all the Securities to be immediately due and payable.
Upon such a declaration, such Issue Price plus accrued Original Issue Discount,
and such accrued and unpaid interest, if any, shall be due and payable
immediately. If an Event of Default specified in Section 6.01(6) or (7) occurs
in respect of the Company and is continuing, the Issue Price plus accrued
Original Issue Discount or accrued cash interest (or if the Securities have been
converted to semiannual coupon notes following a Tax Event, the Restated
Principal Amount, plus accrued interest) (including contingent interest) on all
the Securities shall become and be immediately due and payable without any
declaration or other act on the part of the Trustee or any Securityholders. The
Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding, by notice to the Trustee (and without notice
to any other Securityholder), may rescind an acceleration and its consequences
if the rescission would not conflict with any judgment or decree and if all
existing Events of Default have been cured or waived except nonpayment of the
Issue Price plus accrued Original Issue Discount or accrued cash interest (or,
if the Securities have been converted to semiannual coupon notes following a Tax
Event, the Restated Principal Amount, plus accrued interest) that have become
due solely as a result of acceleration and if all amounts due to the Trustee
under Section 7.07 have been paid. No such rescission shall affect any
subsequent Default or impair any right consequent thereto.

            SECTION 6.03 Other Remedies. If an Event of Default occurs and is
continuing, the Trustee may pursue any available remedy to collect the payment
of the Issue Price plus accrued Original Issue Discount on the Securities or to
enforce the performance of any provision of the Securities or this Indenture.

            The Trustee may maintain a proceeding even if the Trustee does not
possess any of the Securities or does not produce any of the Securities in the
proceeding. A delay or omission by the Trustee or any Securityholder in
exercising any right or remedy accruing upon an Event of Default shall not
impair the right or remedy or constitute a waiver of, or acquiescence in, the
Event of Default. Except as set forth in Section 2.07 hereof, no remedy is
exclusive of any other remedy. All available remedies are cumulative.

            SECTION 6.04 Waiver of Past Defaults. Subject to Section 6.02, the
Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding, by notice to the Trustee (and without notice
to any other Securityholder), may waive an existing Default and its consequences
except (1) an Event of Default described in Section 6.01(1) or (2), (2) a
Default in respect of a provision that under Section 9.02 cannot be amended
without the consent of each Securityholder affected or (3) a Default which
constitutes a failure to convert
<PAGE>
                                      -45-

any Security in accordance with the terms of Article 11. When a Default is
waived, it is deemed cured, but no such waiver shall extend to any subsequent or
other Default or impair any consequent right. This Section 6.04 shall be in lieu
of Section 316(a)1(B) of the TIA and such Section 316(a)1(B) is hereby expressly
excluded from this Indenture, as permitted by the TIA.

            SECTION 6.05 Control by Majority. The Holders of a majority in
aggregate Principal Amount at Maturity of the Securities at the time outstanding
may direct the time, method and place of conducting any proceeding for any
remedy available to the Trustee or of exercising any trust or power conferred on
the Trustee. However, the Trustee may refuse to follow any direction that
conflicts with law or this Indenture or that the Trustee determines in good
faith is unduly prejudicial to the rights of other Securityholders or would
involve the Trustee in personal liability unless the Trustee is offered
indemnity satisfactory to it. This Section 6.05 shall be in lieu of Section
316(a)1(A) of the TIA and such Section 316(a)1(A) is hereby expressly excluded
from this Indenture, as permitted by the TIA.

            SECTION 6.06 Limitation on Suits. A Securityholder may not pursue
any remedy with respect to this Indenture or the Securities unless:

            (1) the Holder gives to the Trustee written notice stating that an
      Event of Default is continuing;

            (2) the Holders of at least 25% in aggregate Principal Amount at
      Maturity of the Securities at the time outstanding make a written request
      to the Trustee to pursue the remedy;

            (3) such Holder or Holders offer to the Trustee security or
      indemnity satisfactory to the Trustee against any loss, liability or
      expense;

            (4) the Trustee does not comply with the request within 60 days
      after receipt of such notice, request and offer of security or indemnity;
      and

            (5) the Holders of a majority in aggregate Principal Amount at
      Maturity of the Securities at the time outstanding do not give the Trustee
      a direction inconsistent with the request during such 60-day period.

            A Securityholder may not use this Indenture to prejudice the rights
of any other Securityholder or to obtain a preference or priority over any other
Securityholder.

            SECTION 6.07 Rights of Holders to Receive Payment. Notwithstanding
any other provision of this Indenture, the right of any Holder to receive
payment of the Principal Amount at Maturity (or if the Securities have been
converted to semiannual coupon notes following a Tax Event pursuant to Article
10, the Restated Principal Amount, plus accrued cash interest), Issue Price plus
accrued Original Issue Discount, Redemption Price, Purchase Price, Change in
Control Purchase Price, or cash interest in respect of the Securities held by
such Holder, on or
<PAGE>
                                      -46-

after the respective due dates expressed in the Securities or any Redemption
Date, and to convert the Securities in accordance with Article 11, or to bring
suit for the enforcement of any such payment on or after such respective dates
or the right to convert, shall not be impaired or affected adversely without the
consent of such Holder.

            SECTION 6.08 Collection Suit by Trustee. If an Event of Default
described in Section 6.01(1) or (2) occurs and is continuing, the Trustee may
recover judgment in its own name and as trustee of an express trust against the
Company for the whole amount owing with respect to the Securities and the
amounts provided for in Section 7.07.

            SECTION 6.09 Trustee May File Proofs of Claim. In case of the
pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other judicial
proceeding relative to the Company or any other obligor upon the Securities or
the property of the Company or of such other obligor or their creditors, the
Trustee (irrespective of whether the Principal Amount at Maturity, Restated
Principal Amount, Issue Price plus accrued Original Issue Discount or cash
interest, Redemption Price, Purchase Price or Change in Control Purchase Price
shall then be due and payable as therein expressed or by declaration or
otherwise and irrespective of whether the Trustee shall have made any demand on
the Company for the payment of any such amount) shall be entitled and empowered,
by intervention in such proceeding or otherwise,

            (a) to file and prove a claim for the whole amount of the Principal
      Amount at Maturity, Restated Principal Amount, Issue Price plus accrued
      Original Issue Discount or cash interest, Redemption Price, Purchase
      Price, Change in Control Purchase Price (or, if the Securities have been
      converted to semiannual coupon notes following a Tax Event, the Restated
      Principal Amount, plus accrued interest), as the case may be, and to file
      such other papers or documents as may be necessary or advisable in order
      to have the claims of the Trustee (including any claim for the reasonable
      compensation, expenses, disbursements and advances of the Trustee, its
      agents and counsel or any other amounts due the Trustee under Section
      7.07) and of the Holders allowed in such judicial proceeding, and

            (b) to collect and receive any moneys or other property payable or
      deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
similar official in any such judicial proceeding is hereby authorized by each
Holder to make such payments to the Trustee and, in the event that the Trustee
shall consent to the making of such payments directly to the Holders, to pay the
Trustee any amount due it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 7.07.

            Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement,
<PAGE>
                                      -47-

adjustment or composition affecting the Securities or the rights of any Holder
thereof, or to authorize the Trustee to vote in respect of the claim of any
Holder in any such proceeding.

            SECTION 6.10 Priorities. If the Trustee collects any money pursuant
to this Article 6, it shall pay out the money in the following order:

            FIRST: to the Trustee for amounts due under Section 7.07;

            SECOND: to Securityholders for amounts due and unpaid on the
      Securities for the Principal Amount at Maturity, Restated Principal
      Amount, Issue Price plus accrued Original Issue Discount or cash interest,
      Redemption Price, Purchase Price or Change in Control Purchase Price (or,
      if the Securities have been converted to semiannual coupon notes following
      a Tax Event, the Restated Principal Amount, plus accrued interest), as the
      case may be, ratably, without preference or priority of any kind,
      according to such amounts due and payable on the Securities; and

            THIRD: the balance, if any, to the Company.

            The Trustee may fix a record date and payment date for any payment
to Securityholders pursuant to this Section 6.10. At least 15 days before such
record date, the Trustee shall mail to each Securityholder and the Company a
notice that states the record date, the payment date and the amount to be paid.

            SECTION 6.11 Undertaking for Costs. In any suit for the enforcement
of any right or remedy under this Indenture or in any suit against the Trustee
for any action taken or omitted by it as Trustee, a court in its discretion may
require the filing by any party litigant (other than the Trustee) in the suit of
an undertaking to pay the costs of the suit, and the court in its discretion may
assess reasonable costs, including reasonable attorneys' fees and expenses,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant. This Section 6.11
does not apply to a suit by the Trustee, a suit by a Holder pursuant to Section
6.07 or a suit by Holders of more than 10% in aggregate Principal Amount at
Maturity of the Securities at the time outstanding. This Section 6.11 shall be
in lieu of Section 315(e) of the TIA and such Section 315(e) is hereby expressly
excluded from this Indenture, as permitted by the TIA.

            SECTION 6.12 Waiver of Stay, Extension or Usury Laws. The Company
covenants (to the extent that it may lawfully do so) that it will not at any
time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any stay or extension law or any usury or other law
wherever enacted, now or at any time hereafter in force, which would prohibit or
forgive the Company from paying all or any portion of the Principal Amount at
Maturity, Restated Principal Amount, Issue Price plus accrued Original Issue
Discount or cash interest, Redemption Price, Purchase Price or Change in Control
Purchase Price (or, if the Securities have been converted to semiannual coupon
notes following a Tax Event, the Restated Principal Amount, plus accrued
interest), as contemplated herein, or which may affect
<PAGE>
                                      -48-

the covenants or the performance of this Indenture; and the Company (to the
extent that it may lawfully do so) hereby expressly waives all benefit or
advantage of any such law, and covenants that it will not hinder, delay or
impede the execution of any power herein granted to the Trustee, but will suffer
and permit the execution of every such power as though no such law had been
enacted.

                                   ARTICLE 7

                                     TRUSTEE

            SECTION 7.01 Duties of Trustee.

            (a) If an Event of Default has occurred and is continuing, the
Trustee shall exercise the rights and powers vested in it by this Indenture and
use the same degree of care and skill in its exercise as a prudent person would
exercise or use under the circumstances in the conduct of such person's own
affairs.

            (b) Except during the continuance of an Event of Default:

            (1) the Trustee need perform only those duties that are specifically
      set forth in this Indenture and no others; and

            (2) in the absence of bad faith on its part, the Trustee may
      conclusively rely, as to the truth of the statements and the correctness
      of the opinions expressed therein, upon certificates or opinions furnished
      to the Trustee and conforming to the requirements of this Indenture, but
      in case of any such certificates or opinions which by any provision hereof
      are specifically required to be furnished to the Trustee, the Trustee
      shall examine the certificates and opinions to determine whether or not
      they conform to the requirements of this Indenture, but need not confirm
      or investigate the accuracy of mathematical calculations or other facts
      stated therein.

This Section 7.01(b) shall be in lieu of Section 315(a) of the TIA and such
Section 315(a) is hereby expressly excluded from this Indenture, as permitted by
the TIA.

            (c) The Trustee may not be relieved from liability for its own
negligent action, its own negligent failure to act or its own willful
misconduct, except that:

            (1) this paragraph (c) does not limit the effect of paragraph (b) of
      this Section 7.01;

            (2) the Trustee shall not be liable for any error of judgment made
      in good faith by a Responsible Officer unless it is proved that the
      Trustee was negligent in ascertaining the pertinent facts; and
<PAGE>
                                      -49-

            (3) the Trustee shall not be liable with respect to any action it
      takes or omits to take in good faith in accordance with a direction
      received by it pursuant to Section 6.05.

Subparagraphs (c)(1), (2) and (3) shall be in lieu of Sections 315(d)(1),
315(d)(2) and 315(d)(3) of the TIA and such Sections 315(d)(1), 315(d)(2) and
315(d)(3) are hereby expressly excluded from this Indenture, as permitted by the
TIA.

            (d) Every provision of this Indenture that in any way relates to the
Trustee is subject to paragraphs (a), (b), (c) and (e) of this Section 7.01.

            (e) The Trustee may refuse to perform any duty or exercise any right
or power or extend or risk its own funds or otherwise incur any financial
liability unless it receives indemnity satisfactory to it against any loss,
liability or expense.

            (f) Money held by the Trustee in trust hereunder need not be
segregated from other funds except to the extent required by law. The Trustee
(acting in any capacity hereunder) shall be under no liability for interest on
any money received by it hereunder unless otherwise agreed in writing with the
Company.

            SECTION 7.02 Rights of Trustee. Subject to its duties and
responsibilities under the provisions of Section 7.01, and, except as expressly
excluded from this Indenture pursuant to said Section 7.01, subject also to its
duties and responsibilities under the TIA:

            (a) the Trustee may conclusively rely and shall be protected in
      acting or refraining from acting upon any resolution, certificate,
      statement, instrument, opinion, report, notice, request, direction,
      consent, order, bond, debenture, note, other evidence of indebtedness or
      other paper or document believed by it to be genuine and to have been
      signed or presented by the proper party or parties;

            (b) whenever in the administration of this Indenture the Trustee
      shall deem it desirable that a matter be proved or established prior to
      taking, suffering or omitting any action hereunder, the Trustee (unless
      other evidence be herein specifically prescribed) may, in the absence of
      bad faith on its part, conclusively rely upon an Officers' Certificate;

            (c) the Trustee may execute any of the trusts or powers hereunder or
      perform any duties hereunder either directly or by or through agents or
      attorneys and the Trustee shall not be responsible for any misconduct or
      negligence on the part of any agent or attorney appointed with due care by
      it hereunder;

            (d) the Trustee shall not be liable for any action taken, suffered,
      or omitted to be taken by it in good faith which it believes to be
      authorized or within its rights or powers conferred under this Indenture;
<PAGE>
                                      -50-

            (e) the Trustee may consult with counsel selected by it and any
      advice or Opinion of Counsel shall be full and complete authorization and
      protection in respect of any action taken or suffered or omitted by it
      hereunder in good faith and in accordance with such advice or Opinion of
      Counsel;

            (f) the Trustee shall be under no obligation to exercise any of the
      rights or powers vested in it by this Indenture at the request, order or
      direction of any of the Holders, pursuant to the provisions of this
      Indenture, unless such Holders shall have offered to the Trustee security
      or indemnity satisfactory to it against the costs, expenses and
      liabilities which may be incurred therein or thereby;

            (g) any request or direction of the Company mentioned herein shall
      be sufficiently evidenced by a Company Request or Company Order and any
      resolution of the Board of Directors may be sufficiently evidenced by a
      resolution of the Board of Directors;

            (h) the Trustee shall not be bound to make any investigation into
      the facts or matters stated in any resolution, certificate, statement,
      instrument, opinion, report, notice, request, direction, consent, order,
      bond, debenture, note, other evidence of indebtedness or other paper or
      document, but the Trustee, in its discretion, may make such further
      inquiry or investigation into such facts or matters as it may see fit,
      and, if the Trustee shall determine to make such further inquiry or
      investigation, it shall be entitled to examine the books, records and
      premises of the Company, personally or by agent or attorney at the sole
      cost of the Company and shall incur no liability or additional liability
      of any kind by reason of such inquiry or investigation;

            (i) the Trustee shall not be deemed to have notice of any Default or
      Event of Default unless a Responsible Officer of the Trustee has actual
      knowledge thereof or unless written notice of any event which is in fact
      such a default is received by a Responsible Officer of the Trustee at the
      Corporate Trust Office of the Trustee, and such notice references the
      Securities and this Indenture;

            (j) the rights, privileges, protections, immunities and benefits
      given to the Trustee, including, without limitation, its right to be
      indemnified, are extended to, and shall be enforceable by, the Trustee in
      each of its capacities hereunder, and to each agent, custodian and other
      Person employed to act hereunder; and

            (k) the Trustee may request that the Company deliver an Officers'
      Certificate setting forth the names of individuals and/or titles of
      officers authorized at such time to take specified actions pursuant to
      this Indenture, which Officers' Certificate may be signed by any person
      authorized to sign an Officers' Certificate, including any person
      specified as so authorized in any such certificate previously delivered
      and not superseded.
<PAGE>
                                      -51-

            SECTION 7.03 Individual Rights of Trustee. The Trustee in its
individual or any other capacity may become the owner or pledgee of Securities
and may otherwise deal with the Company or its Affiliates with the same rights
it would have if it were not Trustee. Any Paying Agent, Registrar, Conversion
Agent or co-registrar may do the same with like rights. However, the Trustee
must comply with Sections 7.10 and 7.11.

            SECTION 7.04 Trustee's Disclaimer. The Trustee makes no
representation as to the validity or adequacy of this Indenture or the
Securities, it shall not be accountable for the Company's use or application of
the proceeds from the Securities, it shall not be responsible for any statement
in the registration statement for the Securities under the Securities Act or in
the Indenture or the Securities (other than its certificate of authentication),
or the determination as to which beneficial owners are entitled to receive any
notices hereunder.

            SECTION 7.05 Notice of Defaults. If a Default occurs and if it is
known to a Responsible Officer of the Trustee, the Trustee shall give to each
Securityholder notice of the Default within 90 days after such Responsible
Officer obtains knowledge of such Default unless such Default shall have been
cured or waived before the giving of such notice. Except in the case of a
Default described in Section 6.01(1) or (2), the Trustee may withhold the notice
if and so long as a committee of its Responsible Officers in good faith
determines that withholding the notice is in the interests of Securityholders.
The second sentence of this Section 7.05 shall be in lieu of the proviso to
Section 315(b) of the TIA and such proviso is hereby expressly excluded from
this Indenture, as permitted by the TIA. The Trustee shall not be deemed to have
knowledge of a Default unless a Responsible Officer of the Trustee has received
written notice of such Default.

            SECTION 7.06 Reports by Trustee to Holders. Within 60 days after
each May 15 beginning with the May 15 following the date of this Indenture, the
Trustee shall mail to each Securityholder a brief report dated as of such May 15
that complies with TIA Section 313(a), if required to do so by such Section
313(a). The Trustee also shall comply with TIA Section 313(b).

            A copy of each report at the time of its mailing to Securityholders
shall be filed with the SEC and each securities exchange, if any, on which the
Securities are listed. The Company agrees to promptly notify the Trustee
whenever the Securities become listed on any securities exchange and of any
delisting thereof.

            SECTION 7.07 Compensation and Indemnity. The Company agrees:

            (a) to pay to the Trustee from time to time such reasonable
      compensation as the Company and the Trustee shall from time to time agree
      in writing for all services rendered by it hereunder (which compensation
      shall not be limited (to the extent permitted by law) by any provision of
      law in regard to the compensation of a trustee of an express trust);
<PAGE>
                                      -52-

            (b) to reimburse the Trustee upon its request for all reasonable
      expenses, disbursements and advances incurred or made by the Trustee in
      accordance with any provision of this Indenture (including the reasonable
      compensation and the expenses, advances and disbursements of its agents
      and counsel), except any such expense, disbursement or advance as may be
      attributable to its negligence or bad faith; and

            (c) to indemnify the Trustee or any predecessor, Trustee and their
      agents for, and to hold them harmless against, any loss, damage, claim,
      liability, cost or expense (including reasonable attorney's fees and
      expenses and taxes (other than taxes based upon, measured by or determined
      by the income of the Trustee)) incurred without negligence or bad faith on
      its part, arising out of or in connection with the acceptance or
      administration of this trust, including the reasonable costs and expenses
      of defending itself against any claim (whether asserted by the Company or
      any Holder or any other Person) or liability in connection with the
      exercise or performance of any of its powers or duties hereunder.

            To secure the Company's payment obligations in this Section 7.07,
the Holders shall have been deemed to have granted to the Trustee a lien prior
to the Securities on all money or property held or collected by the Trustee,
except that held in trust to pay the Principal Amount at Maturity, Issue Price
plus accrued Original Issue Discount, Redemption Price, Purchase Price, Change
in Control Purchase Price, or cash interest, if any, as the case may be, on
particular Securities.

            The Company's payment obligations pursuant to this Section 7.07
shall survive the discharge of this Indenture and the resignation or removal of
the Trustee. When the Trustee incurs expenses after the occurrence of a Default
specified in Section 6.01(6) or (7), the expenses including the reasonable
charges and expenses of its counsel, are intended to constitute expenses of
administration under any Bankruptcy Law.

            SECTION 7.08 Replacement of Trustee. The Trustee may resign by so
notifying the Company; provided, however, no such resignation shall be effective
until a successor Trustee has accepted its appointment pursuant to this Section
7.08. The Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding may remove the Trustee by so notifying the
Trustee and the Company. The Company shall remove the Trustee if:

            (1) the Trustee fails to comply with Section 7.10;

            (2) the Trustee is adjudged bankrupt or insolvent;

            (3) a receiver or public officer takes charge of the Trustee or its
property; or

            (4) the Trustee otherwise becomes incapable of acting.
<PAGE>
                                      -53-

            If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint, by
resolution of its Board of Directors, a successor Trustee.

            A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company satisfactory in form and
substance to the retiring Trustee and the Company. Thereupon the resignation or
removal of the retiring Trustee shall become effective, and the successor
Trustee shall have all the rights, powers and duties of the Trustee under this
Indenture. The successor Trustee shall mail a notice of its succession to
Securityholders. The retiring Trustee shall promptly transfer all property held
by it as Trustee to the successor Trustee, subject to the lien provided for in
Section 7.07.

            If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding may petition any court of competent
jurisdiction at the expense of the Company for the appointment of a successor
Trustee.

            If the Trustee fails to comply with Section 7.10, any Securityholder
may petition any court of competent jurisdiction for the removal of the Trustee
and the appointment of a successor Trustee.

            SECTION 7.09 Successor Trustee by Merger. If the Trustee
consolidates with, merges or converts into, or transfers all or substantially
all its corporate trust business or assets to, another corporation, the
resulting, surviving or transferee corporation without any further act shall be
the successor Trustee.

            SECTION 7.10 Eligibility; Disqualification. The Trustee shall at all
times satisfy the requirements of TIA Sections 310(a)(1) and 310(b). The Trustee
(or its parent holding company) shall have a combined capital and surplus of at
least $50,000,000 as set forth in its most recent published annual report of
condition. Nothing herein contained shall prevent the Trustee from filing with
the Commission the application referred to in the penultimate paragraph of TIA
Section 310(b).

            SECTION 7.11 Preferential Collection of Claims Against Company. The
Trustee shall comply with TIA Section 311(a), excluding any creditor
relationship listed in TIA Section 311(b). A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated therein.
<PAGE>
                                      -54-

                                   ARTICLE 8

                             DISCHARGE OF INDENTURE

            SECTION 8.01 Discharge of Liability on Securities. When (i) the
Company delivers to the Trustee all outstanding Securities (other than
Securities replaced pursuant to Section 2.07) for cancellation or (ii) all
outstanding Securities have become due and payable and the Company or any
Guarantor irrevocably deposits with the Trustee, the Paying Agent (if the Paying
Agent is not the Company or any of its Affiliates) or the Conversion Agent cash
or, if expressly permitted by the terms of the Securities or the Indenture,
Common Stock sufficient to pay all amounts due and owing on all outstanding
Securities (other than Securities replaced pursuant to Section 2.07), and if in
either case the Company pays all other sums payable hereunder by the Company,
then this Indenture shall, subject to Section 7.07, cease to be of further
effect. The Trustee shall join in the execution of a document prepared by the
Company acknowledging satisfaction and discharge of this Indenture on demand of
the Company accompanied by an Officers' Certificate and Opinion of Counsel and
at the cost and expense of the Company.

            SECTION 8.02 Repayment to the Company. The Trustee and the Paying
Agent shall return to the Company upon written request any money or securities
held by them for the payment of any amount with respect to the Securities that
remains unclaimed for two years, subject to applicable unclaimed property law.
After return to the Company, Holders entitled to the money or securities must
look to the Company for payment as general creditors unless an applicable
abandoned property law designates another person and the Trustee and the Paying
Agent shall have no further liability to the Securityholders with respect to
such money or securities for that period commencing after the return thereof.

                                   ARTICLE 9

                                   AMENDMENTS

            SECTION 9.01 Without Consent of Holders. The Company and the Trustee
may amend this Indenture or the Securities without the consent of any
Securityholder:

            (1) to cure any ambiguity, omission, defect or inconsistency;

            (2) to comply with Article 5 or Section 11.14;

            (3) to secure the Company's obligations under the Securities and
      this Indenture;

            (4) to add to the Company's covenants for the benefit of the
      Securityholders or to surrender any right or power conferred upon the
      Company;
<PAGE>
                                      -55-

            (5) to make any change to comply with the TIA, or any amendment
      thereto, or to comply with any requirement of the SEC in connection with
      the qualification of the Indenture under the TIA, or as necessary in
      connection with the registration of the Securities under the Securities
      Act; or

            (6) to make any change that does not adversely affect the rights of
      any Holders (it being understood that any amendment described in clause
      (1) above made solely to conform this Indenture to the final offering
      memorandum provided to investors in connection with the initial offering
      of the Securities will be deemed not to adversely affect the rights or
      interests of Holders).

            SECTION 9.02 With Consent of Holders. With the written consent of
the Holders of at least a majority in aggregate Principal Amount at Maturity of
the Securities at the time outstanding, the Company and the Trustee may amend
this Indenture or the Securities. However, without the consent of each
Securityholder affected, an amendment to this Indenture or the Securities may
not:

            (1) reduce the percentage in Principal Amount at maturity of
      Securities whose Holders must consent to an amendment;

            (2) make any change in the manner or rate of accrual of Original
      Issue Discount or cash interest, reduce the rate of cash interest referred
      to in paragraph 1 of the Securities, or extend the time for payment of
      Original Issue Discount or cash interest on any Security;

            (3) reduce the Principal Amount at Maturity, Restated Principal
      Amount or accrued Original Issue Discount or cash interest, with respect
      to any Security, or extend the Stated Maturity of any Security;

            (4) reduce the Redemption Price, Purchase Price or Change in Control
      Purchase Price of any Security;

            (5) make any Security payable in money or securities other than that
      stated in the Security;

            (6) make any change in Article 10 of this Indenture, or this Section
      9.02, except to increase any percentage set forth therein;

            (7) make any change that adversely affects the right to convert any
      Security;

            (8) make any change that adversely affects the right to require the
      Company to purchase the Securities in accordance with the terms thereof
      and this Indenture;
<PAGE>
                                      -56-

            (9) impair the right to institute suit for the enforcement of any
      payment with respect to, or conversion of, the Securities; or

            (10) release any Guarantor from any of its obligations under its
      Guarantee other than in accordance with the terms of this Indenture.

            It shall not be necessary for the consent of the Holders under this
Section 9.02 to approve the particular form of any proposed amendment, but it
shall be sufficient if such consent approves the substance thereof.

            After an amendment under this Section 9.02 becomes effective, the
Company shall mail to each Holder a notice briefly describing the amendment.

            SECTION 9.03 Compliance with Trust Indenture Act. Every supplemental
indenture executed pursuant to this Article shall comply with the TIA.

            SECTION 9.04 Revocation and Effect of Consents, Waivers and Actions.
Until an amendment, consent, waiver or other action by Holders becomes
effective, a consent thereto by a Holder of a Security hereunder is a continuing
consent by the Holder and every subsequent Holder of that Security or portion of
the Security that evidences the same obligation as the consenting Holder's
Security, even if notation of the amendment, consent, waiver or other action is
not made on the Security. However, any such Holder or subsequent Holder may
revoke the consent as to such Holder's Security or portion of the Security if
the Trustee receives the notice of revocation before the date as of which the
amendment, consent, waiver or action is made effective. After an amendment,
consent, waiver or action becomes effective, it shall bind every Securityholder.

            SECTION 9.05 Notation on or Exchange of Securities. Securities
authenticated and delivered after the execution of any supplemental indenture
pursuant to this Article may, and shall if required by the Trustee, bear a
notation in form approved by the Trustee as to any matter provided for in such
supplemental indenture. If the Company shall so determine, new Securities so
modified as to conform, in the opinion of the Board of Directors, to any such
supplemental indenture may be prepared and executed by the Company and
authenticated and delivered by the Trustee in exchange for outstanding
Securities.

            SECTION 9.06 Trustee to Sign Supplemental Indentures. The Trustee
shall sign any supplemental indenture authorized pursuant to this Article 9 if
the amendment contained therein does not adversely affect the rights, duties,
liabilities or immunities of the Trustee. If it does, the Trustee may, but need
not, sign such supplemental indenture. In signing such supplemental indenture
the Trustee shall receive, and (subject to the provisions of Section 7.01) shall
be fully protected in relying upon, in addition to the documents required by
Section 14.04, an Officers' Certificate and an Opinion of Counsel stating that
such amendment is authorized or permitted by this Indenture.
<PAGE>
                                      -57-

            SECTION 9.07 Effect of Supplemental Indentures. Upon the execution
of any supplemental indenture under this Article, this Indenture shall be
modified in accordance therewith, and such supplemental indenture shall form a
part of this Indenture for all purposes; and every Holder of Securities
theretofore or thereafter authenticated and delivered hereunder shall be bound
thereby.

                                   ARTICLE 10

                          SPECIAL TAX EVENT CONVERSION

            SECTION 10.01 Optional Conversion to Semiannual Coupon Note upon Tax
Event. From and after (i) the date (the "Tax Event Date") of the occurrence of a
Tax Event and (ii) the date the Company exercises the option provided for in
this Section 10.01, whichever is later (the "Option Exercise Date"), at the
option of the Company, interest in lieu of future Original Issue Discount or
cash interest shall accrue at the rate of 6.25% per annum, calculated on a
semiannual bond equivalent basis, on a Restated Principal Amount per $1,000
original Principal Amount at Maturity (the "Restated Principal Amount") equal to
the Issue Price plus Original Issue Discount accrued through the Option Exercise
Date and shall be payable semiannually on June 16 and December 16 of each year
(each an "Interest Payment Date") to Holders of record at the close of business
on June 1or December 1 (each a "Regular Record Date") immediately preceding such
Interest Payment Date. Interest will be computed on the basis of a 360-day year
comprised of twelve 30-day months and will accrue from the most recent date on
which interest has been paid or, if no interest has been paid, from the Option
Exercise Date. Within 15 days of the occurrence of a Tax Event, the Company
shall deliver a written notice of such Tax Event by facsimile and first-class
mail to the Trustee and within 15 days of its exercise of such option the
Company shall deliver a written notice of the Option Exercise Date by facsimile
and first-class mail to the Trustee and by first class mail to the Holders of
the Securities. From and after the Option Exercise Date, (i) the Company shall
be obligated to pay at Stated Maturity, in lieu of the Principal Amount at
Maturity of a Security, the Restated Principal Amount thereof plus accrued and
unpaid interest with respect to any Security and (ii) "Issue Price and accrued
Original Issue Discount," "Issue Price plus Original Issue Discount" or similar
words, as used herein, shall mean Restated Principal Amount plus accrued and
unpaid interest with respect to any Security. Securities authenticated and
delivered after the Option Exercise Date may, and shall if required by the
Trustee, bear a notation in a form approved by the Trustee as to the conversion
of the Securities to semiannual coupon notes. No other changes to the Indenture
shall result as a result of the events described in this Section 10.01.

                                   ARTICLE 11

                                   CONVERSION

            SECTION 11.01 Conversion Privilege. A Holder of a Security may
convert such Security into Common Stock at any time during the periods and
subject to the conditions
<PAGE>
                                      -58-

stated in paragraph 8 of the Securities, subject to the provisions of this
Article 11. The number of shares of Common Stock issuable upon conversion of a
Security per $1,000 of Principal Amount at Maturity thereof (the "Conversion
Rate") shall be determined in accordance with the provisions of paragraph 8 of
the Securities.

            A Holder may convert a portion of the Principal Amount at Maturity
of a Security if the portion is $1,000 or an integral multiple of $1,000.
Provisions of this Indenture that apply to conversion of all of a Security also
apply to conversion of a portion of a Security.

            SECTION 11.02 Conversion Procedure. To convert a Security, a Holder
must satisfy the requirements in paragraph 8 of the Securities. The date on
which the Holder satisfies all those requirements is the conversion date (the
"Conversion Date"). As soon as practicable after the Conversion Date but in any
event no later than the seventh Business Day following the Conversion Date, the
Company shall deliver to the Holder, through the Conversion Agent, a certificate
for the number of full shares of Common Stock issuable upon the conversion and
cash in lieu of any fractional share determined pursuant to Section 11.03. The
Company shall determine such full number of shares and the amounts of the
required cash with respect to any fractional share, and shall set forth such
information in an Officers' Certificate delivered to the Conversion Agent. The
Conversion Agent shall have no duties under this paragraph unless and until it
has received such certificate.

            The person in whose name the certificate is registered shall be
treated as a stockholder of record on and after the Conversion Date; provided,
however, that no surrender of a Security on any date when the stock transfer
books of the Company shall be closed shall be effective to constitute the Person
or Persons entitled to receive the shares of Common Stock upon such conversion
as the record holder or holders of such shares of Common Stock on such date, but
such surrender shall be effective to constitute the Person or Persons entitled
to receive such shares of Common Stock as the record holder or holders thereof
for all purposes at the close of business on the next succeeding day on which
such stock transfer books are open; such conversion shall be at the Conversion
Rate in effect on the date that such Security shall have been surrendered for
conversion, as if the stock transfer books of the Company had not been closed.
Upon conversion of a Security, such Person shall no longer be a Holder of such
Security.

            Holders may surrender a Security for conversion by means of a
book-entry delivery in accordance with paragraph 8 of the Security and the
regulations of the applicable book-entry facility.

            No payment or adjustment will be made for dividends on, or other
distributions with respect to, any Common Stock except as provided in this
Article 11. On conversion of a Security, that portion of accrued Original Issue
Discount or cash interest attributable to the period from the Issue Date of the
Security through the Conversion Date with respect to the converted Security
shall not be cancelled, extinguished or forfeited, but rather shall be deemed to
be paid in full to the Holder thereof through delivery of the Common Stock
(together with the cash payment, if any, in lieu of fractional shares) in
exchange for the Security being converted pursu-
<PAGE>
                                      -59-

ant to the provisions hereof; and the fair market value of such shares of Common
Stock (together with any such cash payment in lieu of fractional shares) shall
be treated as issued, to the extent thereof, first in exchange for the greater
of Original Issue Discount or cash interest through the Conversion Date, and the
balance, if any, of such fair market value of such Common Stock (and any such
cash payment) shall be treated as issued in exchange for the Issue Price of the
Security being converted pursuant to the provisions hereof. Notwithstanding the
foregoing, accrued cash interest will be payable upon conversion of Securities
made concurrently with or after acceleration of Securities following an Event of
Default.

            If the Holder converts more than one Security at the same time, the
number of shares of Common Stock issuable upon the conversion shall be based on
the total Principal Amount at Maturity of the Securities converted.

            A Security surrendered for conversion based on (a) the Common Stock
price may be surrendered for conversion until the close of business on June 16,
2023, (b) the Security being called for redemption may be surrendered for
conversion at any time prior to the close of business on the second Business Day
immediately preceding the Redemption Date, even if it is not otherwise
convertible at such time, and (c) upon the occurrence of certain corporate
transactions more fully described in paragraph 8 of the Security may be
surrendered for conversion at any time from and after the date which is 15 days
prior to the anticipated effective date of such transaction until 15 days after
the actual date of such transaction, and if such day is not a Business Day, the
next occurring Business Day following such day.

            Upon surrender of a Security that is converted in part, the Company
shall execute, and the Trustee shall authenticate and deliver to the Holder, a
new Security in an authorized denomination equal in Principal Amount at Maturity
to the unconverted portion of the Security surrendered.

            SECTION 11.03 Fractional Shares. The Company will not issue a
fractional share of Common Stock upon conversion of a Security. Instead, the
Company will deliver cash for the current market value of the fractional share.
The current market value of a fractional share shall be determined, to the
nearest 1/1,000th of a share, by multiplying the per share Sale Price of the
Common Stock, on the last Trading Day prior to the Conversion Date, by the
fractional amount and rounding the product to the nearest whole cent.

            SECTION 11.04 Taxes on Conversion. If a Holder converts a Security,
the Company shall pay any documentary, stamp or similar issue or transfer tax
due on the issue of shares of Common Stock upon the conversion. However, the
Holder shall pay any such tax which is due because the Holder requests the
shares to be issued in a name other than the Holder's name and any income tax
which is imposed on the Holder as a result of the conversion. The Conversion
Agent may refuse to deliver the certificates representing the Common Stock being
issued in a name other than the Holder's name until the Conversion Agent
receives a sum sufficient to pay any tax which will be due because the shares
are to be issued in a name other
<PAGE>
                                      -60-

than the Holder's name. Nothing herein shall preclude the Company from any tax
withholding or directing the withholding of any tax required by law or
regulations.

            SECTION 11.05 Company to Provide Stock. The Company shall, prior to
issuance of any Securities under this Article 11, and from time to time as may
be necessary, reserve out of its authorized but unissued Common Stock a
sufficient number of shares of Common Stock to permit the conversion of the
Securities.

            All shares of Common Stock delivered upon conversion of the
Securities shall be newly issued shares or treasury shares, shall be duly and
validly issued and fully paid and nonassessable and shall be free from
preemptive rights and free of any lien or adverse claim created by the Company.

            The Company will endeavor promptly to comply with all federal and
state securities laws regulating the offer and delivery of shares of Common
Stock upon conversion of Securities, if any, and will list or cause to have
quoted such shares of Common Stock on each national securities exchange or in
the over-the-counter market or such other market on which the Common Stock is
then principally listed or quoted.

            SECTION 11.06 Adjustment for Change in Capital Stock. Except as set
forth in Section 11.14, if, after the Issue Date of the Securities, the Company:

            (a) pays a dividend or makes a distribution on its Common Stock in
      shares of its Common Stock;

            (b) subdivides its outstanding shares of Common Stock into a greater
      number of shares;

            (c) pays a dividend or makes a distribution on its Common Stock in
      shares of its Capital Stock (other than Common Stock or rights, warrants
      or options for its Capital Stock);

            (d) combines its outstanding shares of Common Stock into a smaller
      number of shares; or

            (e) issues by reclassification of its Common Stock any shares of its
      Capital Stock (other than rights, warrants or options for its Capital
      Stock),

then the conversion privilege and the Conversion Rate in effect immediately
prior to such action shall be adjusted so that the Holder of a Security
thereafter converted may receive the number of shares or other units of Capital
Stock of the Company which such Holder would have owned immediately following
such action if such Holder had converted the Security immediately prior to such
action.
<PAGE>
                                      -61-

            The adjustment shall become effective immediately after the record
date in the case of a dividend or distribution and immediately after the
effective date in the case of a subdivision, combination or reclassification.

            SECTION 11.07 Adjustment for Rights Issue. Except as set forth in
Sections 11.14 and 11.19, if after the Issue Date, the Company distributes any
rights, warrants or options to all holders of its Common Stock entitling them,
for a period expiring within 60 days after the record date for such
distribution, to purchase shares of Common Stock at a price per share less than
the Sale Price of the Common Stock as of the Time of Determination, the
Conversion Rate shall be adjusted in accordance with the formula:

                   R' = R (O + N)
                    ---------------
                    O + [(N x P)/M]

            where:

            R' = the adjusted Conversion Rate.

            R = the current Conversion Rate.

            O = the number of shares of Common Stock outstanding on the record
date for the distribution to which this Section 11.07 is being applied.

            N = the number of additional shares of Common Stock offered pursuant
to the distribution.

            P = the offering price per share of the additional shares.

            M = the Average Sale Price, minus, in the case of (i) a distribution
to which Section 11.06(b) applies or (ii) a distribution to which Section 11.08
applies, for which, in each case, (x) the record date shall occur on or before
the record date for the distribution to which this Section 11.07 applies and (y)
the Ex-Dividend Time shall occur on or after the date of the Time of
Determination for the distribution to which this Section 11.07 applies, the fair
market value (on the record date for the distribution to which this Section
11.07 applies) of:

            (i) the Capital Stock of the Company distributed in respect of each
      share of Common Stock in such Section 11.06(b) distribution and

            (ii) assets of the Company or debt securities or any rights,
      warrants or options to purchase securities of the Company distributed in
      respect of each share of Common Stock in such Section 11.08 distribution.

            The Board of Directors shall determine fair market values for the
purposes of this Section 11.07.

<PAGE>
                                      -62-

            The adjustment shall become effective immediately after the record
date for the determination of shareholders entitled to receive the rights,
warrants or options to which this Section 11.07 applies. If all of the shares of
Common Stock subject to such rights, warrants or options have not been issued
when such rights, warrants or options expire, then the Conversion Rate shall
promptly be readjusted to the Conversion Rate which would then be in effect had
the adjustment upon the issuance of such rights, warrants or options been made
on the basis of the actual number of shares of Common Stock issued upon the
exercise of such rights, warrants or options.

            No adjustment shall be made under this Section 11.07 if the
application of the formula stated above in this Section 11.07 would result in a
value of R' that is equal to or less than the value of R.

            SECTION 11.08 Adjustment for Other Distributions. If, after the
Issue Date of the Securities, the Company distributes to all holders of its
Common Stock any of its assets or evidence of indebtedness or any rights,
warrants or options to purchase securities of the Company (including securities
or cash, but excluding (x) distributions of Capital Stock referred to in Section
11.06 and distributions of rights, warrants or options referred to in Section
11.07 and (y) cash dividends or other cash distributions that are paid out of
consolidated current net earnings or earnings retained in the business as shown
on the books of the Company unless such cash dividends or other cash
distributions are Extraordinary Cash Dividends) the Conversion Rate shall be
adjusted in accordance with the formula:

                   R'  =   R x M
                          --------
                           M - F

            where:

            R' = the adjusted Conversion Rate.

            R = the current Conversion Rate.

            M = the Average Sale Price, minus, in the case of a distribution to
which Section 11.06(c) applies, for which (i) the record date shall occur on or
before the record date for the distribution to which this Section 11.08 applies
and (ii) the Ex-Dividend Time shall occur on or after the date of the Time of
Determination for the distribution to which this Section 11.08 applies, the fair
market value (on the record date for the distribution to which this Section
11.08 applies) of any Capital Stock of the Company distributed in respect of
each share of Common Stock in such Section 11.06(c) distribution.

            F = the fair market value (on the record date for the distribution
to which this Section 11.08 applies) of the assets, securities, rights, warrants
or options to be distributed in respect of each share of Common Stock in the
distribution to which this Section 11.08 is being ap-
<PAGE>
                                      -63-

plied (including, in the case of cash dividends or other cash distributions
giving rise to an adjustment, all such cash distributed concurrently).

            The Board of Directors shall determine fair market values for the
purposes of this Section 11.08.

            The adjustment shall become effective immediately after the record
date for the determination of shareholders entitled to receive the distribution
to which this Section 11.08 applies.

            For purposes of this Section 11.08, the term "Extraordinary Cash
Dividend" shall mean any cash dividend with respect to the Common Stock the
amount of which, together with the aggregate amount of cash dividends on the
Common Stock to be aggregated with such cash dividend in accordance with the
provisions of this paragraph, equals or exceeds the threshold percentage set
forth in item (i) below. For purposes of item (i) below, the "Ex-Dividend
Measurement Period" with respect to a cash dividend on the Common Stock shall
mean the 365 consecutive day period ending on the date prior to the Ex-Dividend
Time with respect to such cash dividend, and the "Relevant Cash Dividends" with
respect to a cash dividend on the Common Stock shall mean the cash dividends on
the Common Stock with Ex-Dividend Times occurring in the Ex-Dividend Measurement
Period.

            (i) If, upon the date prior to the Ex-Dividend Time with respect to
      a cash dividend on the Common Stock, the aggregate amount of such cash
      dividend together with the amounts of all Relevant Cash Dividends equals
      or exceeds on a per share basis 5% of the Sale Price of the Common Stock
      on the last Trading Day preceding the date of declaration by the Board of
      Directors of the cash dividend or distribution with respect to which this
      provision is being applied, then such cash dividend together with all
      Relevant Cash Dividends, shall be deemed to be an Extraordinary Cash
      Dividend and for purposes of applying the formula set forth above in this
      Section 11.08, the value of "F" shall be equal to (y) the aggregate amount
      of such cash dividend together with the amount of all Relevant Cash
      Dividends, minus (z) the aggregate amount of all Relevant Cash Dividends
      for which a prior adjustment in the Conversion Rate was previously made
      under this Section 11.08.

            In making the determinations required by item (i) above, the amount
      of cash dividends paid on a per share basis and the amount of any Relevant
      Cash Dividends specified in item (i) above, shall be appropriately
      adjusted to reflect the occurrence during such period of any event
      described in Section 11.06.

            SECTION 11.09 When Adjustment May Be Deferred. No adjustment in the
Conversion Rate need be made unless the adjustment would require an increase or
decrease of at least 1% in the Conversion Rate. Any adjustments that are not
made shall be carried forward and taken into account in any subsequent
adjustment and all adjustments that are made and carried forward shall be taken
in the aggregate in order to determine if the 1% threshold is met.
<PAGE>
                                      -64-

            All calculations under this Article 11 shall be made to the nearest
cent or to the nearest 1/1,000th of a share, as the case may be.

            SECTION 11.10 When No Adjustment Required. No adjustment need be
made for a transaction referred to in Section 11.06, 11.07, 11.08 or 11.14 if
Securityholders are to participate in the transaction on a basis and with notice
that the Board of Directors determines to be fair and appropriate in light of
the basis and notice on which holders of Common Stock participate in the
transaction. Such participation by Securityholders may include participation
upon conversion provided that an adjustment shall be made at such time as the
Securityholders are no longer entitled to participate.

            No adjustment need be made for rights to purchase Common Stock
pursuant to a Company plan for reinvestment of dividends or interest.

            No adjustment need be made for a change in the par value or no par
value of the Common Stock.

            To the extent the Securities become convertible pursuant to this
Article 11 into cash, no adjustment need be made thereafter as to the cash.
Interest will not accrue on the cash.

            No adjustment will be made pursuant to this Article 11 that would
result, through the application of two or more provisions hereof, in the
duplication of any adjustment.

            SECTION 11.11 Notice of Adjustment. Whenever the Conversion Rate is
adjusted, the Company shall promptly mail to Securityholders a notice of the
adjustment. The Company shall file with the Trustee and the Conversion Agent
such notice and a certificate from the Company's independent public accountants
briefly stating the facts requiring the adjustment and the manner of computing
it. Upon receipt by it of such notice, and at the written request of the
Company, the Conversion Agent will promptly mail such notice to Securityholders
at the Company's expense. The certificate shall be conclusive evidence that the
adjustment is correct. Neither the Trustee nor any Conversion Agent shall be
under any duty or responsibility with respect to any such certificate except to
exhibit the same to any Holder desiring inspection thereof.

            SECTION 11.12 Voluntary Increase. The Company from time to time may
increase the Conversion Rate by any amount for any period of time. Whenever the
Conversion Rate is increased, the Company shall mail to Securityholders and file
with the Trustee and the Conversion Agent a notice of the increase. The Company
shall mail the notice at least 15 days before the date the increased Conversion
Rate takes effect. The notice shall state the increased Conversion Rate and the
period it will be in effect.

            A voluntary increase of the Conversion Rate does not change or
adjust the Conversion Rate otherwise in effect for purposes of Section 11.06,
11.07 or 11.08.
<PAGE>
                                      -65-

            SECTION 11.13 Notice of Certain Transactions. If:

            (a) the Company takes any action that would require an adjustment in
      the Conversion Rate pursuant to Section 11.06, 11.07 or 11.08 (unless no
      adjustment is to occur pursuant to Section 11.10); or

            (b) the Company takes any action that would require a supplemental
      indenture pursuant to Section 11.14; or

            (c) there is a liquidation or dissolution of the Company;

then the Company shall mail to Securityholders and file with the Trustee and the
Conversion Agent a notice stating the proposed record date for a dividend or
distribution or the proposed effective date of a subdivision, combination,
reclassification, consolidation, merger, binding share exchange, transfer,
liquidation or dissolution. The Company shall file and mail the notice at least
15 days before such date. Failure to file or mail the notice or any defect in it
shall not affect the validity of the transaction.

            SECTION 11.14 Reorganization of Company; Special Distributions. If
the Company is a party to a transaction subject to Article 5 (other than a sale
of all or substantially all of the assets of the Company in a transaction in
which the holders of Common Stock immediately prior to such transaction do not
receive securities, cash, property or other assets of the Company or any other
Person) or a merger or binding share exchange which reclassifies or changes its
outstanding Common Stock, the Person obligated to deliver securities, cash or
other assets upon conversion of Securities shall enter into a supplemental
indenture. If the issuer of securities deliverable upon conversion of Securities
is an Affiliate of the successor Company, that issuer shall join in the
supplemental indenture.

            The supplemental indenture shall provide that the Holder of a
Security may convert it into the kind and amount of securities, cash or other
assets which such Holder would have received immediately after the
consolidation, merger, binding share exchange or transfer if such Holder had
converted the Security immediately before the effective date of the transaction,
assuming (to the extent applicable) that such Holder (i) was not a constituent
Person or an Affiliate of a constituent Person to such transaction; (ii) made no
election with respect thereto; and (iii) was treated alike with the plurality of
non-electing Holders. The supplemental indenture shall provide for adjustments
which shall be as nearly equivalent as may be practical to the adjustments
provided for in this Article 11. The successor Company shall mail to
Securityholders a notice briefly describing the supplemental indenture.

            If this Section applies, neither Section 11.06 nor 11.07 applies.

            If the Company makes a distribution to all holders of its Common
Stock of any of its assets, or debt securities or any rights, warrants or
options to purchase securities of the Company that would otherwise result in an
adjustment in the Conversion Rate pursuant to the provi-
<PAGE>
                                      -66-

sions of Section 11.08, then, from and after the record date for determining the
holders of Common Stock entitled to receive the distribution, a Holder of a
Security that converts such Security in accordance with the provisions of this
Indenture shall upon such conversion be entitled to receive, in addition to the
shares of Common Stock into which the Security is convertible, the kind and
amount of securities, cash or other assets comprising the distribution that such
Holder would have received if such Holder had converted the Security immediately
prior to the record date for determining the holders of Common Stock entitled to
receive the distribution.

            SECTION 11.15 Company Determination Final. Any determination that
the Company or the Board of Directors must make pursuant to Section 11.03,
11.06, 11.07, 11.08, 11.09, 11.10, 11.14 or 11.17 is conclusive.

            SECTION 11.16 Trustee's Adjustment Disclaimer. The Trustee has no
duty to determine when an adjustment under this Article 11 should be made, how
it should be made or what it should be. The Trustee has no duty to determine
whether a supplemental indenture under Section 11.14 need be entered into or
whether any provisions of any supplemental indenture are correct. The Trustee
shall not be accountable for and makes no representation as to the validity or
value of any securities or assets issued upon conversion of Securities. The
Trustee shall not be responsible for the Company's failure to comply with this
Article 11. Each Conversion Agent (other than the Company or an Affiliate of the
Company) shall have the same protection under this Section 11.16 as the Trustee.

            SECTION 11.17 Simultaneous Adjustments. In the event that this
Article 11 requires adjustments to the Conversion Rate under more than one of
Sections 11.06, 11.07 or 11.08, and the record dates for the distributions
giving rise to such adjustments shall occur on the same date, then such
adjustments shall be made by applying, first, the provisions of Section 11.06,
second, the provisions of Section 11.08 and, third, the provisions of Section
11.07.

            SECTION 11.18 Successive Adjustments. After an adjustment to the
Conversion Rate under this Article 11, any subsequent event requiring an
adjustment under this Article 11 shall cause an adjustment to the Conversion
Rate as so adjusted.

            SECTION 11.19 Rights Issued in Respect of Common Stock Issued upon
Conversion. Each share of Common Stock issued upon conversion of Securities
pursuant to this Article 11 shall be entitled to receive the appropriate number
of common stock or preferred stock purchase rights, as the case may be (the
"Rights"), if any, that all shares of Common Stock are entitled to receive and
the certificates representing the Common Stock issued upon such conversion shall
bear such legends, if any, in each case as may be provided by the terms of any
shareholder rights agreement adopted by the Company, as the same may be amended
from time to time (in each case, a "Rights Agreement"). Provided that such
Rights Agreement requires that each share of Common Stock issued by the Company
(including those that might be issued upon conversion of Securities) at any time
prior to the distribution of separate certificates representing the Rights be
entitled to receive such Rights, then, notwithstanding anything else to the
contrary in this Article 11, there shall not be any adjustment to the conversion
privilege or Conversion
<PAGE>
                                      -67-

Rate or any other term or provision of the Securities as a result of the
issuance of Rights, the distribution of separate certificates representing the
Rights, the exercise or redemption of such Rights in accordance with any such
Rights Agreement, or the termination or invalidation of such Rights.

            SECTION 11.20 Company's Right to Elect to Pay Cash or Common Stock.
In lieu of delivery of Common Stock upon notice of conversion of any Securities
(for all or any portion of the Securities), the Company may elect to pay Holders
surrendering Securities an amount in cash per Security (or a portion of a
Security) equal to the Average Sale Price of Common Stock for the five
consecutive trading days immediately following either (a) the date of notice of
election to deliver cash as described below if the Company has not given notice
of redemption, or (b) the conversion date, in the case of conversion following
the notice of redemption specifying that the Company intends to deliver cash
upon conversion, in either case multiplied by the Conversion Rate in effect on
that date. The Company will inform the Holders through the Trustee no later than
two business days following the conversion date of its election to deliver
shares of Common Stock or to pay cash in lieu of delivery of Common Stock,
unless the Company has already informed Holders of its election in connection
with its optional redemption of the Securities pursuant to Section 3.01 herein.
If the Company elects to deliver all of such payment in Common Stock, the Common
Stock will be delivered by the Company through the Conversion Agent no later
than the fifth business day following the Conversion Date. If the Company elects
to pay all or a portion of such payment in cash, the payment, including any
delivery of Common Stock, will be made to Holders surrendering Securities no
later than the tenth business day following the applicable conversion date. If
an Event of Default (other than a default in a cash payment upon conversion of
the Securities) has occurred and is continuing, the Company may not pay cash
upon conversion of any Security or portion of a Security (other than cash for
fractional shares).

                                   ARTICLE 12

                               PAYMENT OF INTEREST

            SECTION 12.01 Interest Payments. Interest on any Security that is
payable in cash, and is punctually paid or duly provided for, on any applicable
payment date shall be paid to the person in whose name that Security is
registered at the close of business on the Regular Record Date or accrual date,
as the case may be, for such interest at the office or agency of the Company
maintained for such purpose. Each installment of interest on any Security shall
be paid in same-day funds by transfer to an account maintained by the payee
located inside the United States, if the payee is the Holder of not less than
$1,000,000 aggregate principal amount at maturity of the Securities and the
Trustee shall have received proper wire transfer instructions from such payee
not later than the related Regular Record Date or accrual date, as the case may
be, or, if no such instructions have been received, by check mailed to the payee
at its address set forth on the Registrar's books. In the case of a permanent
Global Security, interest payable on any applicable payment date will be paid to
the Depositary, with respect to that portion of such
<PAGE>
                                      -68-

permanent Global Security held for its account by Cede & Co. for the purpose of
permitting such party to credit the interest received by it in respect of such
permanent Global Security to the accounts of the beneficial owners thereof.

            SECTION 12.02 Defaulted Interest. Except as otherwise specified with
respect to the Securities, any interest on any Security that is payable, but is
not punctually paid or duly provided for, within 30 days following any
applicable payment date (herein called "Defaulted Interest", which term shall
include any accrued and unpaid interest that has accrued on such defaulted
amount in accordance with paragraph 1 of the Securities), shall forthwith cease
to be payable to the registered Holder thereof on the relevant Regular Record
Date or accrual date, as the case may be, by virtue of having been such Holder,
and such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in clause (1) or (2) below:

            (1) The Company may elect to make payment of any Defaulted Interest
      to the persons in whose names the Securities are registered at the close
      of business on a special record date for the payment of such Defaulted
      Interest, which shall be fixed in the following manner. The Company shall
      notify the Trustee in writing of the amount of Defaulted Interest proposed
      to be paid on each Security and the date of the proposed payment (which
      shall not be less than 25 days after such notice is received by the
      Trustee), and at the same time the Company shall deposit with the Trustee
      an amount of money equal to the aggregate amount proposed to be paid in
      respect of such Defaulted Interest or shall make arrangements satisfactory
      to the Trustee for such deposit on or prior to the date of the proposed
      payment, such money when deposited to be held in trust for the benefit of
      the persons entitled to such Defaulted Interest as in this clause
      provided. Thereupon the Trustee shall fix a special record date (the
      "Special Record Date") for the payment of such Defaulted Interest which
      shall be not more than 15 days and not less than 10 days prior to the date
      of the proposed payment and not less than 10 days after the receipt by the
      Trustee of the notice of the proposed payment. The Trustee shall promptly
      notify the Company of such Special Record Date and, in the name and at the
      expense of the Company, shall cause notice of the proposed payment of such
      Defaulted Interest and the Special Record Date therefor to be mailed,
      first-class postage prepaid, to each Holder of Securities at his address
      as it appears on the list of Securityholders maintained pursuant to
      Section 2.05 not less than 10 days prior to such Special Record Date.
      Notice of the proposed payment of such Defaulted Interest and the Special
      Record Date therefor having been mailed as aforesaid, such Defaulted
      Interest shall be paid to the persons in whose names the Securities are
      registered at the close of business on such Special Record Date and shall
      no longer be payable pursuant to the following clause (2).

            (2) The Company may make payment of any Defaulted Interest on the
      Securities in any other lawful manner not inconsistent with the
      requirements of any securities exchange on which such Securities may be
      listed, and upon such notice as may be required by such exchange, if,
      after notice given by the Company to the Trustee of the pro-
<PAGE>
                                      -69-

      posed payment pursuant to this clause, such manner of payment shall be
      deemed practicable by the Trustee.

            SECTION 12.03 Interest Rights Preserved. Subject to the foregoing
provisions of this Article 12 and Section 2.06, each Security delivered under
this Indenture upon registration of transfer of or in exchange for or in lieu of
any other Security shall carry the rights to semiannual and contingent interest
accrued and unpaid, and to accrue, which were carried by such other Security.

                                   ARTICLE 13

                                   GUARANTEES

            SECTION 13.01 Guarantees. The Guarantors jointly and severally,
hereby absolutely, unconditionally and irrevocably guarantee the Securities and
obligations of the Company hereunder and thereunder, and guarantee to each
Holder of a Security authenticated and delivered by the Trustee in accordance
with the terms hereof, and to the Trustee on behalf of such Holder, that: (a)
the principal of and cash interest on the Securities will be paid in full when
due, whether at Stated Maturity, by acceleration, redemption or otherwise
(including, without limitation, the amount that would become due but for the
operation of the automatic stay under Section 362(a) of the Bankruptcy Law),
together with cash interest and interest on any overdue interest, to the extent
lawful, and all other obligations of the Company to the Holders or the Trustee
hereunder or thereunder will be paid in full or performed, all in accordance
with the terms hereof and thereof; and (b) in case of any extension of time of
payment or renewal of any Securities or of any such other obligations, the same
shall be paid in full when due or performed in accordance with the terms of the
extension or renewal, whether at Stated Maturity, by acceleration redemption or
otherwise.

            The Guarantors hereby agree that their obligations hereunder shall
be unconditional, irrespective of the validity, regularity or enforceability of
the Securities or this Indenture, the absence of any action to enforce the same,
any waiver or consent by any Holder with respect to any provisions hereof or
thereof, the recovery of any judgment against the Company, any action to enforce
the same or any other circumstance which might otherwise constitute a legal or
equitable discharge or defense of a Guarantor.

            The Guarantors hereby waive (to the extent permitted by law) the
benefits of diligence, presentment, demand for payment, filing of claims with a
court in the event of insolvency or bankruptcy of the Company, any right to
require a proceeding first against the Company or any other Person, protest,
notice and all demands whatsoever and covenants that the Guarantee of such
Guarantor shall not be discharged as to any Security except by complete
performance of the obligations contained in such Security, this Indenture and
such Guarantee. The Guarantors acknowledge that the Guarantees are a guarantee
of payment and not of collection.
<PAGE>
                                      -70-

            The Guarantors hereby agree that, in the event of a default in
payment of principal or cash interest on such Security, whether at its Stated
Maturity, by acceleration, redemption, purchase or otherwise, legal proceedings
may be instituted by the Trustee on behalf of, or by, the Holder of such
Security, subject to the terms and conditions set forth in this Indenture,
directly against each of the Guarantors to enforce such Guarantor's Guarantee
without first proceeding against the Company or any other Guarantor. The
Guarantor agrees that if, after the occurrence and during the continuance of an
Event of Default, the Trustee or any of the Holders are prevented by applicable
law from exercising their respective rights to accelerate the maturity of the
Securities, to collect interest on the Securities, or to enforce or exercise any
other right or remedy with respect to the Securities, such Guarantor shall pay
to the Trustee for the account of the Holder, upon demand therefor, the amount
that would otherwise have been due and payable had such rights and remedies been
permitted to be exercised by the Trustee or any of the Holders.

            If any Holder or the Trustee is required by any court or otherwise
to return to the Company or any Guarantor, or any custodian, trustee, liquidator
or other similar official acting in relation to either the Company or any
Guarantor, any amount paid by any of them to the Trustee or such Holder, the
Guarantee of each of the Guarantors, to the extent theretofore discharged, shall
be reinstated in full force and effect. The Guarantor further agrees that as
between each Guarantor, on the one hand, and the Holders and the Trustee, on the
other hand, (x) subject to this Article Thirteen, the maturity of the
obligations guaranteed hereby may be accelerated as provided in Article Six
hereof for the purposes of the Guarantee of such Guarantor notwithstanding any
stay, injunction or other prohibition preventing such acceleration in respect of
the obligations guaranteed hereby, and (y) in the event of any acceleration of
such obligation as provided in Article Six hereof, such obligations (whether or
not due and payable) shall forthwith become due and payable by each Guarantor
for the purpose of the Guarantee of such Guarantor.

            Each Guarantee shall remain in full force and effect and continue to
be effective should any petition be filed by or against the Company for
liquidation, reorganization, should the Company become insolvent or make an
assignment for the benefit of creditors or should a receiver or trustee be
appointed for all or any significant part of the Company's assets, and shall, to
the fullest extent permitted by law, continue to be effective or be reinstated,
as the case may be, if at any time payment and performance of the Securities
are, pursuant to applicable law, rescinded or reduced in amount, or must
otherwise be restored or returned by any obligee on the Securities, whether as a
"voidable preference," "fraudulent transfer" or otherwise, all as though such
payment or performance had not been made. In the event that any payment or any
part thereof, is rescinded, reduced, restored or returned, for the purposes of
the amounts due under the Guarantees, the Securities shall, to the fullest
extent permitted by law, be reinstated and deemed reduced only by such amount
paid and not so rescinded, reduced, restored or returned. The form of Guarantee
is attached hereto as Exhibit A-2.

            SECTION 13.02 Severability. In case any provision of any Guarantee
shall be invalid, illegal or unenforceable, the validity, legality, and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby.
<PAGE>
                                      -71-

            SECTION 13.03 Future Subsidiaries. If (a) the Company or any of its
Subsidiaries acquires or forms a wholly-owned Subsidiary organized under the
laws of the United States or any state or political subdivision thereof or the
District of Columbia or (b) the Company or any of its Subsidiaries acquires or
forms any Subsidiary (domestic or foreign) and such Subsidiary guarantees any
indebtedness or other obligations of the Company other than the Guarantees of
the Securities, the Company will cause any such Subsidiary to (i) execute and
deliver to the Trustee any amendment or supplement to this Indenture in
accordance with the provisions of Article Nine of this Indenture pursuant to
which such Subsidiary shall guarantee all of the obligations on the Securities
(whether for principal, cash interest, and interest accruing after the filing
of, or which would have accrued but for the filing of, a petition by or against
the Company under Bankruptcy Law, whether or not such interest is allowed as a
claim after such filing in any proceeding under such law), if any, and other
amounts due in connection therewith (including any fees, expenses and
indemnities), on a senior unsecured basis and (ii) deliver to such Trustee an
Opinion of Counsel reasonably satisfactory to such Trustee to the effect that
such amendment or supplement has been duly executed and delivered by such
Subsidiary and is in compliance with the terms of this Indenture. Upon the
execution of any such amendment or supplement, the obligations of the Guarantors
and any such Subsidiary under their respective Guarantees shall become joint and
several and each reference to the "Guarantor" in this Indenture shall, be deemed
to refer to all Guarantors, including such Subsidiary.

            SECTION 13.04 Priority of Guarantees. The Guarantee issued by any
Guarantor shall be unsecured senior obligations of such Guarantor, ranking pari
passu with all other existing and future senior unsecured indebtedness of such
Guarantor, if any.

            SECTION 13.05 Limitation of Guarantors' Liability. Each Guarantor
and by its acceptance hereof each Holder confirms that it is the intention of
all such parties that the guarantee by the Guarantor pursuant to its Guarantee
not constitute a fraudulent transfer or conveyance for purposes of the
Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent
Transfer Act or any similar federal or state law or the provisions of its local
law relating to fraudulent transfer or conveyance. To effectuate the foregoing
intention, the Holders and the Guarantors hereby irrevocably agree that the
obligations of such Guarantor under its Guarantee shall be limited to the
maximum amount that will not, after giving effect to all other contingent and
fixed liabilities of such Guarantor result in the obligations of such Guarantor
under its Guarantee constituting such fraudulent transfer or conveyance.

            SECTION 13.06 Subrogation. Each Guarantor shall be subrogated to all
rights of Holders against the Company in respect of any amounts paid by any
Guarantor pursuant to the provisions of Section 13.01; provided, however, that,
if an Event of Default has occurred and is continuing, no Guarantor shall be
entitled to enforce or receive any payments arising out of, or based upon, such
right of subrogation until all amounts then due and payable by the Company under
this Indenture or the Securities shall have been paid in full.
<PAGE>
                                      -72-

      SECTION 13.07 Reinstatement. The Guarantor hereby agrees (and each Person
who becomes a Guarantor shall agree) that the Guarantee provided for in Section
13.01 shall continue to be effective or be reinstated, as the case may be, (a)
if at any time, payment, or any part thereof, of any obligations or interest
thereon is rescinded or must otherwise be restored by a Holder to the Company
upon the bankruptcy or insolvency of the Company or any Guarantor and (b) at any
time any Guarantor (and each Person who becomes a Guarantor) guarantees any
indebtedness or obligations of the Company.

      SECTION 13.08 Release of the Guarantor. Concurrently with the discharge of
the Securities under Section 8.01, each Guarantor shall be released from all its
obligations under its Guarantee under this Article Thirteen.

      So long as no Default exists or with notice or lapse of time or both,
would exist, the Guarantee issued by any Guarantor shall be automatically and
unconditionally released and discharged upon (a) any sale, exchange or transfer
to any Person that is not an Affiliate of the Company of all of the Capital
Stock of such Guarantor owned by the Company, which transaction is otherwise in
compliance with the Indenture or (b) any release or discharge of all guarantees
by such Guarantor of any indebtedness or obligations of the Company other than
the Guarantees of the Securities.

      SECTION 13.09 Benefits Acknowledged. Each Guarantor acknowledges that it
will receive direct and indirect benefits from the financing arrangements
contemplated by this Indenture and that its guarantee and waivers pursuant to
its Guarantee are knowingly made in contemplation of such benefits.

                                   ARTICLE 14
                                  MISCELLANEOUS

      SECTION 14.01 Trust Indenture Act Controls. If any provision of this
Indenture limits, qualifies, or conflicts with another provision which is
required to be included in this Indenture by the TIA, the required provision
shall control.

      SECTION 14.02 Notices. Any request, demand, authorization, notice, waiver,
consent or communication shall be in writing and delivered in person or delivery
by courier guaranteeing overnight delivery or mailed by first-class mail,
postage prepaid, addressed as follows or transmitted by facsimile transmission
(confirmed by guaranteed overnight courier) to the following facsimile numbers:
<PAGE>
                                      -73-

                  if to the Company:

                           Mesa Air Group, Inc.
                           410 North 44th Street
                           Suite 700
                           Phoenix, AZ   85008
                           Attention:  General Counsel
                           Facsimile:  (602) 685-4352

                  with a copy of any notice given pursuant to Article 6 to:

                           Squire, Sanders & Dempsey L.L.P.
                           Two Renaissance Square
                           Suite 2700
                           40 North Central Avenue
                           Phoenix, AZ   85004
                           Attention:  Gregory R. Hall, Esq.
                           Telephone:  (602) 528-4000
                           Facsimile:  (602) 253-8129

                  if to the Trustee:

                           U.S. Bank National Association
                           One Federal Street
                           Boston, MA  02110
                           Attention: Corporate Trust Services
                           Telephone:  (617) 603-6564
                           Facsimile:  (617) 603-6667

      The Company or the Trustee by notice given to the other in the manner
provided above may designate additional or different addresses for subsequent
notices or communications.

      Any notice or communication given to a Securityholder shall be mailed to
the Securityholder, by first-class mail, postage prepaid, at the
Securityholder's address as it appears on the registration books of the
Registrar and shall be sufficiently given if so mailed within the time
prescribed.

      Failure to mail a notice or communication to a Securityholder or any
defect in it shall not affect its sufficiency with respect to other
Securityholders. If a notice or communication is mailed in the manner provided
above, it is duly given, whether or not received by the addressee.
<PAGE>
                                      -74-

            If the Company mails a notice or communication to the
Securityholders, it shall mail a copy to the Trustee and each Registrar, Paying
Agent, Conversion Agent or co-registrar.

            SECTION 14.03 Communication by Holders with Other Holders.
Securityholders may communicate pursuant to TIA Section 312(b) with other
Securityholders with respect to their rights under this Indenture or the
Securities. The Company, the Trustee, the Registrar, the Paying Agent, the
Conversion Agent and anyone else shall have the protection of TIA Section
312(c).

            SECTION 14.04 Certificate and Opinion as to Conditions Precedent.
Upon any request or application by the Company to the Trustee to take any action
under this Indenture, the Company shall furnish to the Trustee if reasonably
requested:

            (1) an Officers' Certificate stating that, in the opinion of the
      signers, all conditions precedent, if any, provided for in this Indenture
      relating to the proposed action have been complied with; and

            (2) an Opinion of Counsel stating that, in the opinion of such
      counsel, all such conditions precedent have been complied with.

            SECTION 14.05 Statements Required in Certificate or Opinion. Each
Officers' Certificate or Opinion of Counsel with respect to compliance with a
covenant or condition provided for in this Indenture shall include to the extent
required by the Trustee:

            (1) a statement that each person making such Officers' Certificate
      or Opinion of Counsel has read such covenant or condition;

            (2) a brief statement as to the nature and scope of the examination
      or investigation upon which the statements or opinions contained in such
      Officers' Certificate or Opinion of Counsel are based;

            (3) a statement that, in the opinion of each such person, he has
      made such examination or investigation as is necessary to enable such
      person to express an informed opinion as to whether or not such covenant
      or condition has been complied with; and

            (4) a statement that, in the opinion of such person, such covenant
      or condition has been complied with.

            SECTION 14.06 Separability Clause. In case any provision in this
Indenture or in the Securities shall be invalid, illegal or unenforceable, the
validity, legality and enforceability of the remaining provisions shall not in
any way be affected or impaired thereby.

            SECTION 14.07 Rules by Trustee, Paying Agent, Conversion Agent and
Registrar. The Trustee may make reasonable rules for action by or a meeting of
Securityholders. The
<PAGE>
                                      -75-

Registrar, Conversion Agent and the Paying Agent may make reasonable rules for
their functions.

            SECTION 14.08 Calculations. The calculation of the Purchase Price,
Change in Control Purchase Price, Conversion Rate, Market Price, Sale Price of
the Common Stock and each other calculation to be made hereunder shall be the
obligation of the Company. All calculations made by the Company as contemplated
pursuant to this Section 14.08 shall be final and binding on the Company and the
Holders absent manifest error. The Trustee, Paying Agent and Conversion Agent
shall not be obligated to recalculate, recompute or confirm any such
calculations.

            SECTION 14.09 Legal Holidays. A "Legal Holiday" is any day other
than a Business Day. If any specified date (including a date for giving notice)
is a Legal Holiday, the action shall be taken on the next succeeding day that is
not a Legal Holiday, and, if the action to be taken on such date is a payment in
respect of the Securities, no Original Issue Discount or interest, if any, shall
accrue for the intervening period.

            SECTION 14.10 Governing Law. THE LAWS OF THE STATE OF NEW YORK,
WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW, SHALL GOVERN
THIS INDENTURE AND THE SECURITIES.

            SECTION 14.11 No Recourse Against Others. A director, officer,
employee, agent, representative, stockholder or equity holder, as such, of the
Company shall not have any liability for any obligations of the Company under
the Securities or this Indenture or for any claim based on, in respect of or by
reason of such obligations or their creation. By accepting a Security, each
Securityholder shall waive and release all such liability. The waiver and
release shall be part of the consideration for the issue of the Securities.

            SECTION 14.12 Successors. All agreements of the Company in this
Indenture and the Securities shall bind its successor. All agreements of the
Trustee in this Indenture shall bind its successor.

            SECTION 14.13 Multiple Originals. The parties may sign any number of
copies of this Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement. One originally signed copy is enough to
prove this Indenture.
<PAGE>
            IN WITNESS WHEREOF, the undersigned, being duly authorized, have
executed this Indenture on behalf of the respective parties hereto as of the
date first above written.

                                   MESA AIR GROUP, INC.

                                   By:  /s/ Jonathan Ornstein
                                        ----------------------------------------
                                        Name:  Jonathan Ornstein
                                        Title:

                                   MESA AIRLINES, INC.
                                   FREEDOM AIRLINES, INC.
                                   AIR MIDWEST, INC.
                                   MPD, INC.

                                   By:  /s/ Michael Lotz
                                        ----------------------------------------
                                        Name:  Michael Lotz
                                        Title:

                                   REGIONAL AIRCRAFT SERVICES, INC.
                                   MESA AIR GROUP-AIRCRAFT INVENTORY
                                      MANAGEMENT, LLC
                                   RITZ HOTEL MANAGEMENT CORP.

                                   By:  /s/ George Murnane III
                                        ----------------------------------------
                                        Name:  George Murnane III
                                        Title:
<PAGE>
                                   U.S. BANK NATIONAL ASSOCIATION

                                   By:  /s/ Nicole Poole
                                        ----------------------------------------
                                        Name:  Nicole Poole
                                        Title:
<PAGE>
                                   EXHIBIT A-1

                        [FORM OF FACE OF GLOBAL SECURITY]

      THIS NOTE WAS ISSUED WITH ORIGINAL ISSUE DISCOUNT, FOR PURPOSES OF
SECTIONS 1272, 1273 AND 1275 OF THE UNITED STATES INTERNAL REVENUE CODE OF 1986,
AS AMENDED. THE ISSUE PRICE OF THIS NOTE WAS $397.27 PER $1,000 OF PRINCIPAL
AMOUNT AT MATURITY; THE AMOUNT OF ORIGINAL ISSUE DISCOUNT, INCLUDING CASH
INTEREST PAYABLE THROUGH JUNE 16, 2008 TAXABLE AS ORIGINAL ISSUE DISCOUNT UNDER
TREASURY REGULATION SECTION 1.1273-1, IS $726.88 PER $1,000 OF PRINCIPAL AMOUNT
AT MATURITY; THE ISSUE DATE IS JUNE 16, 2003; AND THE YIELD TO MATURITY FOR THE
PURPOSES OF ACCRUING TAX ORIGINAL ISSUE DISCOUNT IS 6.25% PER ANNUM, CALCULATED
ON A SEMIANNUAL BOND EQUIVALENT BASIS.

      UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

      TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE,
BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY TRUST COMPANY, OR TO A SUCCESSOR
THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL
SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS
SET FORTH IN ARTICLE TWO OF THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

      THIS SECURITY AND THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF
THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS. NEITHER THIS
SECURITY, THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THIS SECURITY
NOR ANY INTEREST OR PARTICIPATION HEREIN OR THEREIN MAY BE REOFFERED, SOLD,
ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, REGISTRATION.

                                     A-1-1
<PAGE>
      THE HOLDER OF THIS SECURITY, BY ITS ACCEPTANCE HEREOF, AGREES TO OFFER,
SELL, OR OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE "RESALE
RESTRICTION TERMINATION DATE"), WHICH IS TWO YEARS AFTER THE LATER OF THE LAST
DAY SECURITIES OF THIS ISSUE WERE ISSUED AND THE LAST DATE ON WHICH MESA AIR
GROUP, INC. (THE "COMPANY" OR THE "ISSUER") OR ANY AFFILIATE OF THE COMPANY WAS
THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY) ONLY (A) TO THE
COMPANY OR ANY SUBSIDIARY THEREOF, (B) FOR SO LONG AS THE SECURITIES ARE
ELIGIBLE FOR RESALE PURSUANT TO RULE 144A, TO A PERSON IT REASONABLY BELIEVES IS
A "QUALIFIED INSTITUTIONAL BUYER" AS DEFINED IN RULE 144A UNDER THE SECURITIES
ACT THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED
INSTITUTIONAL BUYER TO WHICH NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN
RELIANCE ON RULE 144A, (C) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" WITHIN THE
MEANING OF SUBPARAGRAPH (a)(1), (2),(3) OR (7) OF RULE 501 UNDER THE SECURITIES
ACT THAT IS ACQUIRING THE SECURITY FOR ITS OWN ACCOUNT, OR FOR THE ACCOUNT OF
SUCH AN INSTITUTIONAL "ACCREDITED INVESTOR," FOR INVESTMENT PURPOSES AND NOT
WITH A VIEW TO, OR FOR OFFER OR SALE IN CONNECTION WITH, ANY DISTRIBUTION IN
VIOLATION OF THE SECURITIES ACT, (D) PURSUANT TO A REGISTRATION STATEMENT WHICH
HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT OR (E) PURSUANT TO ANOTHER
AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT,
SUBJECT TO THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE
OR TRANSFER PURSUANT TO CLAUSE (C) OR (E) TO REQUIRE THE DELIVERY OF AN OPINION
OF COUNSEL, CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM,
AND IN EACH OF THE FOREGOING CASES, A CERTIFICATE OF TRANSFER IN THE FORM
APPEARING ON THE OTHER SIDE OF THIS SECURITY IS COMPLETED AND DELIVERED BY THE
TRANSFEROR TO THE TRUSTEE. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF ANY
HOLDER THAT IS NOT AN AFFILIATE OF THE COMPANY AFTER THE RESALE RESTRICTION
TERMINATION DATE.

      THE FOREGOING LEGEND MAY BE REMOVED FROM THIS SECURITY ON SATISFACTION OF
THE CONDITIONS SPECIFIED IN THE INDENTURE.

                                     A-1-2
<PAGE>
                              MESA AIR GROUP, INC.
                        Senior Convertible Note due 2023

No. A-1                                      CUSIP:  590479 AA 9
Issue Date:  June 16, 2003                   Original Issue Discount:  $726.88
Issue Price:  $397.27                        (for each $1,000 Principal
(for each $1,000 Principal                   Amount at Maturity)
Amount at Maturity)

      MESA AIR GROUP, INC., a Nevada corporation, promises to pay to Cede & Co.
or registered assigns the Principal Amount at Maturity of ONE HUNDRED EIGHTY
NINE MILLION DOLLARS ($189,000,000) on June 16, 2023.

      This Security shall not bear interest except as specified on the other
side of this Security. Original Issue Discount will accrue as specified on the
other side of this Security. This Security is convertible as specified on the
other side of this Security.

      Additional provisions of this Security are set forth on the other side of
this Security.

Dated:   June 16, 2003                       MESA AIR GROUP, INC.

                                             By:________________________________
                                                Title:

TRUSTEE'S CERTIFICATE OF
AUTHENTICATION

U.S. BANK NATIONAL ASSOCIATION,
as Trustee, certifies that this
is one of the Securities referred
to in the within-mentioned Indenture.

By:________________________
    Authorized Officer

Dated:________________________

                                     A-1-3
<PAGE>
                         [FORM OF REVERSE SIDE OF NOTE]
                        Senior Convertible Note due 2023

1.    Interest.

            The Company promises to pay interest in cash on the Principal Amount
at Maturity of this Note at the rate per annum of 2.4829% from the Issue Date,
or from the most recent date to which interest has been paid or provided for,
until June 16, 2008. During such period, the Company will pay cash interest
semiannually in arrears on June 16 and December 16 of each year (each an
"Interest Payment Date") to Holders of record at the close of business on each
June 1 and December 1 (whether or not a business day) (each a "Regular Record
Date") immediately preceding such Interest Payment Date. Cash interest on the
Notes will accrue from the most recent date to which interest has been paid or
duly provided or, if no interest has been paid, from the Issue Date. Cash
interest will be computed on the basis of a 360-day year of twelve 30-day
months.

            After June 16, 2008, this Security shall not bear interest, except
as specified in this paragraph or in paragraphs 5 and 11 hereof. If the
Principal Amount at Maturity hereof or any portion of such Principal Amount at
Maturity is not paid when due (whether upon acceleration pursuant to Section
6.02 of the Indenture, upon the date set for payment of the Redemption Price
pursuant to paragraph 5 hereof, upon the date set for payment of the Purchase
Price or Change in Control Purchase Price pursuant to paragraph 6 hereof or upon
the Stated Maturity of this Security) or if interest (including contingent
interest, if any) due hereon or any portion of such interest is not paid when
due in accordance with paragraph 5 or 11 hereof, then in each such case the
overdue amount shall, to the extent permitted by law, bear interest at the rate
of 6.25% per annum, compounded semiannually, which interest shall accrue from
the date such overdue amount was originally due to the date payment of such
amount, including interest thereon, has been made or duly provided for. All such
interest shall be payable on demand. The accrual of such interest on overdue
amounts shall be in lieu of, and not in addition to, the continued accrual of
Original Issue Discount.

            Original Issue Discount (the difference between the Issue Price and
the Principal Amount at Maturity of the Security), in the period during which a
Security remains outstanding, shall accrue at 6.25% per annum, on a semiannual
bond equivalent basis using a 360-day year composed of twelve 30-day months,
from the Issue Date of this Security.

2.    Method of Payment.

            Subject to the terms and conditions of the Indenture, the Company
will make payments in respect of Redemption Prices, Purchase Prices, Change in
Control Purchase Prices and at Stated Maturity to Holders who surrender
Securities to a Paying Agent to collect such payments in respect of the
Securities. The Company will pay any cash amounts in money of the United States
that at the time of payment is legal tender for payment of public and private
debts. However, the Company may make such cash payments by check payable in such
money.

                                     A-1-4
<PAGE>
3.    Paying Agent, Conversion Agent, Registrar and Bid Solicitation Agent.

            Initially, U.S. Bank National Association, a national banking
association (the "Trustee"), will act as Paying Agent, Conversion Agent,
Registrar and Bid Solicitation Agent. The Company may appoint and change any
Paying Agent, Conversion Agent, Registrar or co-registrar or Bid Solicitation
Agent without notice, other than notice to the Trustee except that the Company
will maintain at least one Paying Agent in the State of New York, City of New
York, Borough of Manhattan, which shall initially be an office or agency of the
Trustee. The Company or any of its Subsidiaries or any of their Affiliates may
act as Paying Agent, Conversion Agent, Registrar or co-registrar. None of the
Company, any of its Subsidiaries or any of their Affiliates shall act as Bid
Solicitation Agent.

4.    Indenture.

            The Company issued and the Guarantors have guaranteed the Securities
pursuant to an Indenture dated as of June 16, 2003 (the "Indenture"), among the
Company, the Guarantors and the Trustee. The terms of the Securities include
those stated in the Indenture and those made part of the Indenture by reference
to the Trust Indenture Act of 1939, as in effect from time to time (the "TIA").
Capitalized terms used herein and not defined herein have the meanings ascribed
thereto in the Indenture. The Securities are subject to all such terms, and
Securityholders are referred to the Indenture and the TIA for a statement of
those terms.

            The Securities and the Guarantees are general unsecured and
unsubordinated obligations, of the Company and the Guarantors, respectively,
limited to $252,000,000 aggregate Principal Amount at Maturity (subject to
Section 2.07 of the Indenture). The Indenture does not limit other indebtedness
of the Company, secured or unsecured.

5.    Redemption at the Option of the Company.

            No sinking fund is provided for the Securities. The Securities are
redeemable as a whole, or from time to time in part, at any time at the option
of the Company in accordance with the Indenture at the Redemption Prices set
forth below, provided that the Securities are not redeemable prior to June 16,
2008.

            The table below shows Redemption Prices of a Security per $1,000
Principal Amount at Maturity on the dates shown below and at Stated Maturity,
which prices reflect accrued Original Issue Discount calculated to each such
date. The Redemption Price of a Security redeemed between such dates shall
include an additional amount reflecting the additional Original Issue Discount
accrued since the preceding date in the table but not including the Redemption
Date.

                                     A-1-5
<PAGE>
<TABLE>
<CAPTION>
REDEMPTION DATE                                             (1)                    (2)                   (3)
                                                           NOTE              ACCRUED ORIGINAL      REDEMPTION PRICE
                                                        ISSUE PRICE               ISSUE               (1) + (2)
                                                             $                   DISCOUNT                 $
                                                                                    $
<S>                                                     <C>                  <C>                   <C>
June 16,
2008                                                      397.27                     0.00                397.27
2009                                                      397.27                    25.22                422.49
2010........................................              397.27                    52.04                449.31
2011........................................              397.27                    80.56                477.83
2012........................................              397.27                   110.89                508.16
2013........................................              397.27                   143.14                540.41
2014........................................              397.27                   177.45                574.72
2015........................................              397.27                   213.93                611.20
2016........................................              397.27                   252.72                649.99
2017........................................              397.27                   293.98                691.25
2018........................................              397.27                   337.86                735.13
2019........................................              397.27                   384.53                781.80
2020........................................              397.27                   434.15                831.42
2021........................................              397.27                   486.93                884.20
2022........................................              397.27                   543.05                940.32
At stated maturity..........................              397.27                   602.73              1,000.00
</TABLE>

            If this Security has been converted to a semiannual coupon note
following the occurrence of a Tax Event, the Redemption Price will be equal to
the Restated Principal Amount plus accrued and unpaid interest from the date of
such conversion to but not including the Redemption Date; but in no event will
this Security be redeemable before June 16, 2008.

6.    Purchase by the Company at the Option of the Holder.

            Subject to the terms and conditions of the Indenture, the Company
shall become obligated to purchase, at the option of the Holder, the Securities
held by such Holder on the following Purchase Dates and at the following
Purchase Prices per $1,000 Principal Amount at Maturity, upon delivery of a
Purchase Notice containing the information set forth in the Indenture, at any
time from the opening of business on the date that is 20 Business Days prior to
such Purchase Date until the close of business on the Business Day immediately
preceding such Purchase Date and upon delivery of the Securities to the Paying
Agent by the Holder as set forth in the Indenture.

                                     A-1-6
<PAGE>
<TABLE>
<CAPTION>
         Purchase Date                                        Purchase Price
         -------------                                        --------------
<S>                                                           <C>
         June 16, 2008                                        $397.27

         June 16, 2013                                        $540.41

         June 16, 2018                                        $735.13
</TABLE>

            The Purchase Price (equal to the Issue Price plus accrued Original
Issue Discount to the Purchase Date) may be paid, at the option of the Company,
in cash or by the issuance and delivery of shares of Common Stock of the
Company, or in any combination thereof in accordance with the Indenture.

            If prior to a Purchase Date this Security has been converted to a
semiannual coupon note following the occurrence of a Tax Event, the Purchase
Price will be equal to the Restated Principal Amount plus accrued and unpaid
interest from the date of conversion to the Purchase Date as provided in the
Indenture.

            At the option of the Holder and subject to the terms and conditions
of the Indenture, the Company shall become obligated to purchase the Securities
held by such Holder no later than 30 Business Days after the occurrence of a
Change in Control of the Company for a Change in Control Purchase Price equal to
the Issue Price plus accrued Original Issue Discount to but not including the
Change in Control Purchase Date, which Change in Control Purchase Price shall be
paid in cash. If prior to a Change in Control Purchase Date this Security has
been converted to a semiannual coupon note following the occurrence of a Tax
Event, the Change in Control Purchase Price shall be equal to the Restated
Principal Amount plus accrued and unpaid interest from the date of conversion to
the Change in Control Purchase Date.

            A third party may make the offer and purchase of the Securities in
lieu of the Company in accordance with the Indenture.

            Holders have the right to withdraw any Purchase Notice or Change in
Control Purchase Notice, as the case may be, by delivering to the Paying Agent a
written notice of withdrawal in accordance with the provisions of the Indenture.

            If cash (and/or securities if permitted under the Indenture)
sufficient to pay the Purchase Price or Change in Control Purchase Price, as the
case may be, of all Securities or portions thereof to be purchased as of the
Purchase Date or the Change in Control Purchase Date, as the case may be, is
deposited with the Paying Agent on the Business Day following the Purchase Date
or the Change in Control Purchase Date, as the case may be, Original Issue
Discount and contingent interest, if any, shall cease to accrue on such
Securities (or portions thereof) on such Purchase Date or Change in Control
Purchase Date, as the case may be, and the Holder thereof shall have no other
rights as such (other than the right to receive the Purchase Price or Change in
Control Purchase Price, as the case may be, if any, upon surrender of such
Security).

                                     A-1-7
<PAGE>
7.    Notice of Redemption.

            Notice of redemption will be mailed at least 30 days but not more
than 60 days before the Redemption Date to each Holder of Securities to be
redeemed at the Holder's registered address. If money sufficient to pay the
Redemption Price of, and accrued and unpaid contingent interest, if any, with
respect to, all Securities (or portions thereof) to be redeemed on the
Redemption Date is deposited with the Paying Agent prior to or on the Redemption
Date, on such Redemption Date, Original Issue Discount and interest (including
contingent interest), if any, shall cease to accrue on such Securities or
portions thereof. Securities in denominations larger than $1,000 of Principal
Amount at Maturity may be redeemed in part but only in integral multiples of
$1,000 of Principal Amount at Maturity.

8.    Conversion.

            Subject to the provisions of this paragraph 8 and notwithstanding
the fact that any other condition to conversion has not been satisfied, Holders
may convert the Securities into Common Stock on a Conversion Date in any fiscal
quarter commencing after June 30, 2003, if, as of the last day of the preceding
fiscal quarter, the Sale Price of the Common Stock for at least 20 trading days
in a period of 30 consecutive trading days ending on the last trading day of
such preceding fiscal quarter is greater than the conversion trigger price per
share. The "conversion trigger price" for any fiscal quarter shall be 110% of
the accreted conversion price per share of Common Stock on the last trading day
of such preceding calendar quarter.

            The "accreted conversion price per share" of Common Stock as of any
day equals the quotient of:

            -     the Issue Price and accrued Original Issue Discount to that
                  day, divided by

            -     the number of shares of Common Stock issuable upon conversion
                  of $1,000 Principal Amount at Maturity of Securities on that
                  day.

            Conversion Based on Trading Price of the Notes. Subject to the
provisions of this paragraph and the Indenture and notwithstanding the fact that
any other condition to conversion has not been satisfied, on or before June 16,
2018, the Securities may be surrendered for conversion at any time after a 10
consecutive trading-day period in which the average of the trading prices for
the notes for that 10 trading-day period was less than 103% of the average
conversion value for the notes during that period.

            The conversion value of a note is equal to the product of the
closing sale price for shares of our common stock on a given day multiplied by
the then current conversion rate, which is the number of shares of common stock
into which each note is then convertible. The trading price of the notes on any
date of determination is the average of the secondary market bid quotations per
note obtained by us or the calculation agent for $2,500,000 principal amount of
notes at approximately 3:30 p.m., New York City time, on such determination date
from two independent nationally recognized securities dealers the Company
selects, provided that if at least two such

                                     A-1-8
<PAGE>
bids cannot reasonably be obtained by the Company or the calculation agent, but
one such bid is obtained, then this one bid shall be used.

            Conversion upon Redemption. Subject to the provisions of this
paragraph 8 and notwithstanding the fact that any other condition to conversion
has not been satisfied, a Holder may convert into Common Stock a Security or
portion of a Security which has been called for redemption pursuant to paragraph
5 hereof, but such Securities may be surrendered for conversion until the close
of business on the second Business Day immediately preceding the Redemption
Date.

            Conversion upon Certain Distributions. Subject to the provisions of
this paragraph 8 and notwithstanding the fact that any other condition to
conversion has not been satisfied, in the event that the Company declares a
dividend or distribution described in Section 11.07 of the Indenture, or a
dividend or a distribution described in Section 11.08 of the Indenture where,
the fair market value, per share, of such dividend or distribution per share of
Common Stock, as determined in the Indenture, exceeds 15% of the Sale Price of
the Common Stock on the Business Day immediately preceding the date of
declaration for such dividend or distribution, the Securities may be surrendered
for conversion beginning on the date the Company gives notice to the Holders of
such right, which shall not be less than 20 days prior to the Ex-Dividend Time
for such dividend or distribution, and Securities may be surrendered for
conversion at any time thereafter until the close of business on the Business
Day prior to the Ex-Dividend Time or until the Company announces that such
dividend or distribution will not take place.

            Conversion upon the Occurrence of Certain Corporate Transactions.
Subject to the provisions of this paragraph 8 and notwithstanding the fact that
any other condition to conversion has not been satisfied, in the event the
Company is a party to a consolidation, merger or binding share exchange pursuant
to which the Common Stock would be converted into cash, securities or other
property as set forth in Section 11.14 of the Indenture, the Securities may be
surrendered for conversion at any time from and after the date which is 15 days
prior to the date the Company announces the anticipated effective time until 15
days after the actual effective date of such transaction, and at the effective
time of such transaction the right to convert a Security into Common Stock will
be deemed to have changed into a right to convert it into the kind and amount of
cash, securities or other property which the holder would have received if the
holder had converted its Security immediately prior to the transaction.

            A Security in respect of which a Holder has delivered a Purchase
Notice or Change in Control Purchase Notice exercising the option of such Holder
to require the Company to purchase such Security may be converted only if such
notice of exercise is withdrawn in accordance with the terms of the Indenture.

            The initial Conversion Rate is 39.727 shares of Common Stock per
$1,000 Principal Amount at Maturity, subject to adjustment in certain events
described in the Indenture. The Company will deliver cash or a check in lieu of
any fractional share of Common Stock.

                                     A-1-9
<PAGE>
            In the event the Company exercises its option pursuant to Section
10.01 of the Indenture to have interest in lieu of Original Issue Discount
accrue on the Security following a Tax Event, the Holder will be entitled on
conversion to receive the same number of shares of Common Stock such Holder
would have received if the Company had not exercised such option.

            Accrued and unpaid interest in lieu of Original Issue Discount and
contingent interest will not be paid on Securities that are converted; provided,
however that Securities surrendered for conversion during the period, in the
case of interest in lieu of Original Issue Discount, from the close of business
on any Regular Record Date next preceding any Interest Payment Date to the
opening of business on such Interest Payment Date, shall be entitled to receive
such interest, in lieu of Original Issue Discount, payable on such Securities on
the corresponding Interest Payment Date and (except Securities with respect to
which the Company has mailed a notice of redemption) Securities surrendered for
conversion during such periods must be accompanied by payment of an amount equal
to the interest in lieu of Original Issue Discount with respect thereto that the
registered Holder is to receive.

            To convert a Security, a Holder must (1) complete and manually sign
the conversion notice below (or complete and manually sign a facsimile of such
notice) and deliver such notice to the Conversion Agent, (2) surrender the
Security to the Conversion Agent, (3) furnish appropriate endorsements and
transfer documents if required by the Conversion Agent, the Company or the
Trustee and (4) pay any transfer or similar tax, if required.

            A Holder may convert a portion of a Security if the Principal Amount
at Maturity of such portion is $1,000 or an integral multiple of $1,000. No
payment or adjustment will be made for dividends on the Common Stock except as
provided in the Indenture. On conversion of a Security, the greater of that
portion of accrued Original Issue Discount (or interest if the Company has
exercised its option provided for in paragraph 10 hereof) or Tax Original Issue
Discount attributable to the period from the Issue Date (or, if the Company has
exercised the option referred to in paragraph 10 hereof, the later of (x) the
date of such exercise and (y) the date on which interest was last paid) through
the Conversion Date and (except as provided above) accrued contingent interest,
if any, with respect to the converted Security shall not be cancelled,
extinguished or forfeited, but rather shall be deemed to be paid in full to the
Holder thereof through the delivery of the Common Stock (together with the cash
payment, if any, in lieu of fractional shares) in exchange for the Security
being converted pursuant to the terms hereof; and the fair market value of such
shares of Common Stock (together with any such cash payment in lieu of
fractional shares) shall be treated as issued, to the extent thereof, first in
exchange for the greater of Original Issue Discount (or interest, if the Company
has exercised its option provided for in paragraph 10 hereof) or Tax Original
Issue Discount accrued through the Conversion Date and any accrued contingent
interest, and the balance, if any, of such fair market value of such Common
Stock (and any such cash payment) shall be treated as issued in exchange for the
Issue Price of the Security being converted pursuant to the provisions hereof.

            The Conversion Rate will be adjusted for dividends or distributions
on Common Stock payable in Common Stock or other Capital Stock; subdivisions,
combinations or certain

                                     A-1-10
<PAGE>
reclassifications of Common Stock; distributions to all holders of Common Stock
of certain rights to purchase Common Stock for a period expiring within 60 days
of the record date for such distribution at less than the Sale Price of the
Common Stock at the Time of Determination; and distributions to such holders of
assets or debt securities of the Company or certain rights to purchase
securities of the Company (excluding certain cash dividends or distributions)
and certain rights pursuant to shareholder rights plans. However, no adjustment
need be made if Securityholders may participate in the transaction or in certain
other cases. The Company from time to time may voluntarily increase the
Conversion Rate.

            If the Company is a party to a consolidation, merger or binding
share exchange or a transfer of all or substantially all of its assets, or upon
certain distributions described in the Indenture, the right to convert a
Security into Common Stock may be changed into a right to convert it into
securities, cash or other assets of the Company or another person.

9.    Conversion Arrangement on Call for Redemption.

            Any Securities called for redemption, unless surrendered for
conversion before the close of business on the Redemption Date, may be deemed to
be purchased from the Holders of such Securities at an amount not less than the
Redemption Price, by one or more investment bankers or other purchasers who may
agree with the Company to purchase such Securities from the Holders, to convert
them into Common Stock of the Company and to make payment for such Securities to
the Trustee in trust for such Holders.

10.   Tax Event.

            (a) From and after (i) the date of the occurrence of a Tax Event
(the "Tax Event Date") and (ii) the date the Company exercises the option
provided for in this paragraph 10, whichever is later (the "Option Exercise
Date"), at the option of the Company, interest in lieu of future Original Issue
Discount shall accrue at the rate of 6.25% per annum on a principal amount per
Security (the "Restated Principal Amount") equal to the Issue Price plus
Original Issue Discount accrued through the Option Exercise Date and shall be
payable semiannually on June 16 and December 16 of each year (each an "Interest
Payment Date") to holders of record at the close of business on June 1 or
December 1 (each a "Regular Record Date") immediately preceding such Interest
Payment Date. Interest will be computed on the basis of a 360-day year comprised
of twelve 30-day months and will accrue from the most recent date to which
interest has been paid or, if no interest has been paid, from the Option
Exercise Date.

            (b) Interest on any Security that is payable, and is punctually paid
or duly provided for, on any Interest Payment Date shall be paid to the person
in whose name that Security is registered at the close of business on the
Regular Record Date for such interest at the office or agency of the Company
maintained for such purpose. Each installment of interest on any Security shall
be paid in same-day funds by transfer to an account maintained by the payee
located inside the United States.

                                     A-1-11
<PAGE>
11.   Defaulted Interest.

            Except as otherwise specified with respect to the Securities, any
Defaulted Interest on any Security shall forthwith cease to be payable to the
registered Holder thereof on the relevant Regular Record Date or accrual date,
as the case may be, by virtue of having been such Holder, and such Defaulted
Interest may be paid by the Company as provided for in Section 12.02 of the
Indenture.

12.   Denominations; Transfer; Exchange.

            The Securities are in fully registered form, without coupons, in
denominations of $1,000 of Principal Amount at Maturity and integral multiples
of $1,000. A Holder may transfer or exchange Securities in accordance with the
Indenture. The Registrar may require a Holder, among other things, to furnish
appropriate endorsements and transfer documents and to pay any taxes and fees
required by law or permitted by the Indenture. The Registrar need not transfer
or exchange any Securities selected for redemption (except, in the case of a
Security to be redeemed in part, the portion of the Security not to be redeemed)
or any Securities in respect of which a Purchase Notice or Change in Control
Purchase Notice has been given and not withdrawn (except, in the case of a
Security to be purchased in part, the portion of the Security not to be
purchased) or any Securities for a period of 15 days before the mailing of a
notice of redemption of Securities to be redeemed.

13.   Persons Deemed Owners.

            The registered Holder of this Security may be treated as the owner
of this Security for all purposes.

14.   Unclaimed Money or Securities.

            The Trustee and the Paying Agent shall return to the Company upon
written request any money or securities held by them for the payment of any
amount with respect to the Securities that remains unclaimed for two years,
subject to applicable unclaimed property laws. After return to the Company,
Holders entitled to the money or securities must look to the Company for payment
as general creditors unless an applicable abandoned property law designates
another person.

15.   Amendment; Waiver.

            Subject to certain exceptions set forth in the Indenture, (i) the
Indenture or the Securities may be amended with the written consent of the
Holders of at least a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding and (ii) certain Defaults may be waived with
the written consent of the Holders of a majority in aggregate Principal Amount
at Maturity of the Securities at the time outstanding. Subject to certain
exceptions set forth in the Indenture, without the consent of any
Securityholder, the Company and the Trustee may amend the Indenture or the
Securities to cure any ambiguity, omission, defect or inconsis-

                                     A-1-12
<PAGE>
tency, or to comply with Article 5 or Section 11.14 of the Indenture, to secure
the Company's obligations under this Security or to add to the Company's
covenants for the benefit of the Securityholders or to surrender any right or
power conferred, to comply with any requirement of the SEC in connection with
the qualification of the Indenture under the TIA, or as necessary in connection
with the registration of the Securities under the Securities Act or to make any
change that does not adversely affect the rights of any Holders.

16.   Defaults and Remedies.

            Under the Indenture, Events of Default include (i) default in the
payment of contingent interest when the same becomes due and payable or of
interest which becomes due and payable upon exercise by the Company of its
option provided for in paragraph 10 hereof which default in either case
continues for 30 days; (ii) default in payment of the Principal Amount at
Maturity (including Original Issue Discount and, if the Securities have been
converted to semiannual coupon notes following a Tax Event, the Restated
Principal Amount), Issue Price plus accrued Original Issue Discount, Redemption
Price, Purchase Price or Change in Control Purchase Price, as the case may be,
in respect of the Securities when the same becomes due and payable; (iii)
failure by the Company or any Guarantor to comply with other agreements in the
Indenture or the Securities, subject to notice and lapse of time; (iv) default
under any Debt, whether such Debt now exists or is created later, which default
results in such Debt becoming or being declared due and payable prior to the
date on which it would otherwise have become due and payable, and the principal
amount of all Debt so accelerated, together with all Debt due and payable but
not paid prior to the end of any grace period, is $10,000,000 or more, and such
acceleration has not been rescinded or annulled within a period of 10 days after
receipt by the Company of a Notice of Default from the Trustee; provided,
however, that if any such default shall be cured, waived, rescinded or annulled,
then the Event of Default by reason thereof shall be deemed not to have
occurred; (v) if any Guarantee ceases to be in full force and effect or is
declared null and void or any Guarantor denies that it has any further liability
under any Guarantee, or gives notice to such effect (other than by reason of the
termination of this Indenture or the release of any such Guarantee in accordance
with this Indenture) and such condition shall have continued for a period of 30
days after written notice of such failure requiring the Guarantor and the
Company to remedy the same shall have been given (x) to the Company by the
Trustee or (y) to the Company and the Trustee by the holders of 25% in aggregate
principal amount of the Securities then outstanding; and (vi) certain events of
bankruptcy or insolvency. If an Event of Default occurs and is continuing, the
Trustee, or the Holders of at least 25% in aggregate Principal Amount at
Maturity of the Securities at the time outstanding, may declare all the
Securities to be due and payable immediately. Certain events of bankruptcy or
insolvency are Events of Default which will result in the Securities becoming
due and payable immediately upon the occurrence of such Events of Default.

            Securityholders may not enforce the Indenture or the Securities
except as provided in the Indenture. The Trustee may refuse to enforce the
Indenture or the Securities unless it receives indemnity or security reasonably
satisfactory to it. Subject to certain limitations, Holders of a majority in
aggregate Principal Amount at Maturity of the Securities at the time out-

                                     A-1-13
<PAGE>
standing may direct the Trustee in its exercise of any trust or power. The
Trustee may withhold from Securityholders notice of any continuing Default
(except a Default in payment of amounts specified in clause (i) or (ii) above)
if it determines that withholding notice is in their interests.

17.   Trustee Dealings with the Company.

            Subject to certain limitations imposed by the TIA, the Trustee under
the Indenture, in its individual or any other capacity, may become the owner or
pledgee of Securities and may otherwise deal with and collect obligations owed
to it by the Company or its Affiliates and may otherwise deal with the Company
or its Affiliates with the same rights it would have if it were not Trustee.

18.   No Recourse Against Others.

            A director, officer, employee, agent, representative, stockholder or
equity holder, as such, of the Company shall not have any liability for any
obligations of the Company under the Securities or the Indenture or for any
claim based on, in respect of or by reason of such obligations or their
creation. By accepting a Security, each Securityholder waives and releases all
such liability. The waiver and release are part of the consideration for the
issue of the Securities.

19.   Authentication.

            This Security shall not be valid until an authorized signatory of
the Trustee manually signs the Trustee's Certificate of Authentication on the
other side of this Security.

20.   Abbreviations.

            Customary abbreviations may be used in the name of a Securityholder
or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the
entireties), JT TEN (=joint tenants with right of survivorship and not as
tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors
Act).

21.   GOVERNING LAW.

            THE LAW OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAW, SHALL GOVERN THE INDENTURE, THE
GUARANTEES AND THIS SECURITY.

                             ----------------------

                                     A-1-14
<PAGE>
            The Company will furnish to any Securityholder upon written request
and without charge a copy of the Indenture which has in it the text of this
Security in larger type. Requests may be made to:

            Mesa Air Group, Inc.
            Attention:  General Counsel

                                     A-1-15
<PAGE>
                                 ASSIGNMENT FORM

To assign this Security, fill in the form below:

I or we assign and transfer this Security to

--------------------------------------------------------------------------------

(Insert assignee's soc. sec. or tax ID no.)

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
             (Print or type assignee's name, address and zip code)

and irrevocably appoint

_____________________ agent to transfer this Security on the books of the
Company. The agent may substitute another to act for him.

                                CONVERSION NOTICE

To convert this Security into Common Stock of the Company, check the box:

                                      [ ]

To convert only part of this Security, state the Principal Amount at Maturity to
be converted (which must be $1,000 or an integral multiple of $1,000):

$_______________________________________________________________________________

If you want the stock certificate made out in another person's name, fill in the
form below:

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
                 (Insert other person's soc. sec. or tax ID no.)

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
           (Print or type other person's name, address and zip code)

                                     A-1-16
<PAGE>
------------------------------------------------------------------------------

Date:  _____________________  Your Signature:___________________________________

------------------------------------------------------------------------------
     (Sign exactly as your name appears on the other side of this Security)

                                     A-1-17
<PAGE>
                                                                     Exhibit A-2

                               [FORM OF GUARANTEE]

            The Guarantors (as defined in the Indenture and which term includes
any successor person under the Indenture), upon the terms and subject to the
conditions set forth in the Indenture, hereby unconditionally guarantee, jointly
and severally, on a senior unsecured basis (such guarantee by each Guarantor
being referred to herein as the "Guarantee") (i) the due and punctual payment of
the principal of and interest (including contingent interest) on the Securities,
whether at maturity, by acceleration or otherwise, the due and punctual payment
of interest on the overdue principal and interest, if any, on the Securities, to
the extent lawful, and the due and punctual performance of all other obligations
of the Company to the Holders or the Trustee all in accordance with the terms
set forth in Article 13 of the Indenture and (ii) in case of any extension of
time of payment or renewal of any Securities or any of such other obligations,
that the same will be promptly paid in full when due or performed in accordance
with the terms of the extension or renewal, whether at Stated Maturity, by
acceleration or otherwise.

            The obligations of the undersigned to the Holders of the Securities
and to the Trustee pursuant to this Guarantee and in the Indenture are expressly
set forth in the Indenture and reference is hereby made to the Indenture for the
precise terms of the Guarantees and all of the other provisions of the Indenture
to which this Guarantee relates.

            No stockholder, officer, director, employee or incorporator, as
such, past, present or future, of any Guarantor shall have any liability under
the Guarantee by reason of his or its status as such stockholder, officer,
director, employee or incorporator.

            The Guarantee shall not be valid or obligatory for any purpose until
the certificate of authentication on the Securities upon which the Guarantee is
noted shall have been executed by the Trustee under the Indenture by the manual
signature of one of its authorized signatories.

            The Guarantee shall be governed by and construed in accordance with
the law of the State of New York applicable to agreements made or instruments
entered into and, in each case, performed in said state.

                                     A-2-1
<PAGE>
            IN WITNESS WHEREOF, the Guarantors have caused this instrument to be
duly executed.

                                             MESA AIRLINES, INC.
                                             FREEDOM AIRLINES, INC.
                                             AIR MIDWEST, INC.
                                             MPD, INC.

                                             By:________________________________
                                                Name:
                                                Title:

                                             REGIONAL AIRCRAFT SERVICES, INC.
                                             MESA AIR GROUP-AIRCRAFT INVENTORY
                                                  MANAGEMENT, LLC
                                             RITZ HOTEL MANAGEMENT CORP.

                                             By:________________________________
                                                Name:
                                                Title:

                                     A-2-2
<PAGE>
                                  EXHIBIT A-3

                         [Form of Certificated Security]

            THIS NOTE WAS ISSUED WITH ORIGINAL ISSUE DISCOUNT, FOR PURPOSES OF
SECTIONS 1272, 1273 AND 1275 OF THE UNITED STATES INTERNAL REVENUE CODE OF 1986,
AS AMENDED. THE ISSUE PRICE OF THIS NOTE WAS $397.27 PER $1,000 OF PRINCIPAL
AMOUNT AT MATURITY; THE AMOUNT OF ORIGINAL ISSUE DISCOUNT, INCLUDING CASH
INTEREST PAYABLE THROUGH JUNE 16, 2008 TAXABLE AS ORIGINAL ISSUE DISCOUNT UNDER
TREASURY REGULATION SECTION 1.1273-1, IS $726.88 PER $1,000 OF PRINCIPAL AMOUNT
AT MATURITY; THE ISSUE DATE IS JUNE 16, 2003; AND THE YIELD TO MATURITY FOR THE
PURPOSES OF ACCRUING TAX ORIGINAL ISSUE DISCOUNT IS 6.25% PER ANNUM, CALCULATED
ON A SEMIANNUAL BOND EQUIVALENT BASIS.

            [INCLUDE IF SECURITY IS A CERTIFICATED SECURITY TO BE HELD BY AN
INSTITUTIONAL ACCREDITED INVESTOR--IN CONNECTION WITH ANY TRANSFER, THE HOLDER
WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER
INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE
TRANSFER COMPLIES WITH THE FOLLOWING RESTRICTIONS.]

            THIS SECURITY AND THE SHARES OF COMMON STOCK ISSUABLE UPON
CONVERSION OF THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS. NEITHER
THIS SECURITY, THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THIS
SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN OR THEREIN MAY BE REOFFERED,
SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, REGISTRATION.

            THE HOLDER OF THIS SECURITY, BY ITS ACCEPTANCE HEREOF, AGREES TO
OFFER, SELL, OR OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE "RESALE
RESTRICTION TERMINATION DATE"), WHICH IS TWO YEARS AFTER THE LATER OF THE LAST
DAY SECURITIES OF THIS ISSUE WERE ISSUED AND THE LAST DATE ON WHICH MESA AIR
GROUP, INC. (THE "COMPANY" OR THE "ISSUER") OR ANY AFFILIATE OF THE COMPANY WAS
THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY) ONLY (A) TO THE
COMPANY OR ANY SUBSIDIARY THEREOF, (B) FOR SO LONG AS THE SECURITIES ARE
ELIGIBLE FOR RESALE PURSUANT TO RULE 144A, TO A PERSON IT REASONABLY BELIEVES IS
A "QUALIFIED INSTITUTIONAL BUYER" AS DEFINED IN RULE 144A UNDER THE SECURITIES
ACT THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED
INSTITUTIONAL BUYER TO

                                     A-3-1
<PAGE>
WHICH NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A,
(C) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH
(a)(1), (2),(3) OR (7) OF RULE 501 UNDER THE SECURITIES ACT THAT IS ACQUIRING
THE SECURITY FOR ITS OWN ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL
"ACCREDITED INVESTOR," FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO, OR FOR
OFFER OR SALE IN CONNECTION WITH, ANY DISTRIBUTION IN VIOLATION OF THE
SECURITIES ACT, (D) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT OR (E) PURSUANT TO ANOTHER AVAILABLE
EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO
THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER
PURSUANT TO CLAUSE (C) OR (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL,
CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH
OF THE FOREGOING CASES, A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THE
OTHER SIDE OF THIS SECURITY IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE
TRUSTEE. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF ANY HOLDER THAT IS NOT
AN AFFILIATE OF THE COMPANY AFTER THE RESALE RESTRICTION TERMINATION DATE.

            THE FOREGOING LEGEND MAY BE REMOVED FROM THIS SECURITY ON
SATISFACTION OF THE CONDITIONS SPECIFIED IN THE INDENTURE.

                                     A-3-2
<PAGE>
                              MESA AIR GROUP, INC.
                        Senior Convertible Note due 2023

No. A-2                                      CUSIP:  590479 AA 9
Issue Date:  June 16, 2003                   Original Issue Discount:  $726.88
Issue Price:  $397.27                        (for each $1,000 Principal
(for each $1,000 Principal                   Amount at Maturity)
Amount at Maturity)

            MESA AIR GROUP, INC., a Nevada corporation, promises to pay to Cede
& Co. or registered assigns the Principal Amount at Maturity of ONE HUNDRED
EIGHTY NINE MILLION DOLLARS ($189,000,000) on June 16, 2023.

            This Security shall not bear interest except as specified on the
other side of this Security. Original Issue Discount will accrue as specified on
the other side of this Security. This Security is convertible as specified on
the other side of this Security.

            Additional provisions of this Security are set forth on the other
side of this Security.

Dated:   June 16, 2003                       MESA AIR GROUP, INC.

                                             By:________________________________
                                                Title:

TRUSTEE'S CERTIFICATE OF
AUTHENTICATION

U.S. BANK NATIONAL ASSOCIATION,
as Trustee, certifies that this
is one of the Securities referred
to in the within-mentioned Indenture.

By:________________________
      Authorized Officer

Dated:________________________

                                     A-3-3
<PAGE>
                                   EXHIBIT B-1

                              TRANSFER CERTIFICATE

            In connection with any transfer of any of the Securities within the
period prior to the expiration of the holding period applicable to the sales
thereof under Rule 144(k) (or any successor provision) under the Securities Act
of 1933, as amended (the "Securities Act"), the undersigned registered owner of
this Security hereby certifies with respect to $____________ Principal Amount at
Maturity of the above-captioned securities presented or surrendered on the date
hereof (the "Surrendered Securities") for registration of transfer, or for
exchange or conversion where the securities issuable upon such exchange or
conversion are to be registered in a name other than that of the undersigned
registered owner (each such transaction being a "transfer"), that such transfer
complies with the restrictive legend set forth on the face of the Surrendered
Securities for the reason checked below:

            [ ]   The transfer of the Surrendered Securities is made to the
                  Company or any subsidiaries; or

            [ ]   The transfer of the Surrendered Securities complies with Rule
                  144A under the Securities Act; or

            [ ]   The transfer of the Surrendered Securities is to an
                  institutional accredited investor, as described in Rule
                  501(a)(1), (2), (3) or (7) under the Securities Act; or

            [ ]   The transfer of the Surrendered Securities is pursuant to an
                  effective registration statement under the Securities Act, or

            [ ]   The transfer of the Surrendered Securities is pursuant to an
                  offshore transaction in accordance with Rule 904 under the
                  Securities Act; or

            [ ]   The transfer of the Surrendered Securities is pursuant to
                  another available exemption from the registration requirement
                  of the Securities Act.

and unless the box below is checked, the undersigned confirms that, to the
undersigned's knowledge, such Securities are not being transferred to an
"affiliate" of the Company as defined in Rule 144 under the Securities Act (an
"Affiliate").

            [ ]   The transferee is an Affiliate of the Company.

DATE:______________________________          ___________________________________
                                                        Signature(s)

            (If the registered owner is a corporation, partnership or
             fiduciary, the title of the Person signing on behalf of
                     such registered owner must be stated.)

                                     B-1-1
<PAGE>
                                   EXHIBIT B-2

             FORM OF LETTER TO BE DELIVERED BY ACCREDITED INVESTORS

Mesa Air Group, Inc.
410 North 44th Street
Suite 700
Phoenix, AZ   85008

Attention:  General Counsel

U.S. Bank National Association
One Federal Street
Boston, MA  02110

Attention:  Corporate Trust Department

Dear Sirs:

            We are delivering this letter in connection with the proposed
transfer of $_____________ Principal Amount at Maturity of the Senior
Convertible Notes due 2023 (the "Securities") issued by Mesa Air Group, Inc.
(the "Company"), which are convertible into shares of the Company's Common
Stock, no par value per share (the "Common Stock").

            We hereby confirm that:

            (i) we are an "accredited investor" within the meaning of Rule
      501(a)(1), (2) or (3) under the Securities Act of 1933, as amended (the
      "Securities Act"), or an entity in which all of the equity owners are
      accredited investors within the meaning of Rule 501(a)(1), (2) or (3)
      under the Securities Act (an "Institutional Accredited Investor");

            (ii) the purchase of Securities by us is for our own account or for
      the account of one or more other Institutional Accredited Investors or as
      fiduciary for the account of one or more trusts, each of which is an
      "accredited investor" within the meaning of Rule 501(a)(7) under the
      Securities Act and for each of which we exercise sole investment
      discretion, or (B) we are a "bank," within the meaning of Section 3(a)(2)
      of the Securities Act, or a "savings and loan association" or other
      institution described in Section 3(a)(5)(A) of the Securities Act that is
      acquiring Securities as fiduciary for the account of one or more
      institutions for which we exercise sole investment discretion;

            (iii) we will acquire Securities having a minimum principal amount
      at maturity of not less than $250,000 for our own account or for any
      separate account for which we are acting;

                                     B-2-1
<PAGE>
            (iv) we have such knowledge and experience in financial and business
      matters that we are capable of evaluating the merits and risks of
      purchasing Securities; and

            (v) we are not acquiring Securities with a view to distribution
      thereof or with any present intention of offering or selling Securities or
      the Common Stock issuable upon conversion thereof, except as permitted
      below; provided that the disposition of our property and property of any
      accounts for which we are acting as fiduciary shall remain at all times
      within our control.

            We understand that the Securities were originally offered and sold
in a transaction not involving any public offering within the United States
within the meaning of the Securities Act and that the Securities and the Common
Stock issuable upon conversion thereof (the Securities and such Common Stock
hereinafter referred to as the "Securities") have not been registered under the
Securities Act, and we agree, on our own behalf and on behalf of each account
for which we acquire any Securities, that if in the future we decide to resell
or otherwise transfer such Securities prior to the date (the "Resale Restriction
Termination Date") which is two years after the later of the last day the
Securities of this issue were issued and the last date on which the Company or
an affiliate of the Company was the owner of the Security, such Securities may
be resold or otherwise transferred only (i) to the Company or any subsidiary
thereof, or (ii) for as long as the Securities are eligible for resale pursuant
to Rule 144A, to a person it reasonably believes is a "qualified institutional
buyer" (as defined in Rule 144A under the Securities Act) that purchases for its
own account or for the account of a qualified institutional buyer to which
notice is given that the transfer is being made in reliance on Rule 144A, or
(iii) to an Institutional Accredited Investor that is acquiring the Security for
its own account, or for the account of such Institutional Accredited Investor
for investment purposes and not with a view to, or for offer or sale in
connection with, any distribution in violation of the Securities Act, or (iv)
pursuant to another available exemption from registration under the Securities
Act (if applicable), or (v) pursuant to a registration statement which has been
declared effective under the Securities Act and, in each case, in accordance
with any applicable securities laws of any state of the United States or any
other applicable jurisdiction and in accordance with the legends set forth on
the Securities. We further agree to provide any person purchasing any of the
Securities from us other than pursuant to clause (v) above a notice advising
such purchaser that resales of such securities are restricted as stated herein.
We understand that the trustee or the transfer agent, as the case may be, for
the Securities will not be required to accept for registration of transfer any
Securities pursuant to (iii) or (iv) above except upon presentation of evidence
satisfactory to the Company that the foregoing restrictions on transfer have
been complied with. We further understand that any Securities will be in the
form of definitive physical certificates and that such certificates will bear a
legend reflecting the substance of this paragraph other than certificates
representing Securities transferred pursuant to clause (v) above.

            We acknowledge that the Company, others and you will rely upon our
confirmations, acknowledgments and agreements set forth herein, and we agree to
notify you promptly in writing if any of our representations or warranties
herein ceases to be accurate and complete.

                                     B-2-2
<PAGE>
            THIS LETTER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE INTERNAL LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO APPLICABLE
PRINCIPLES OF CONFLICTS OF LAW.

                                             ___________________________________
                                             (Name of Purchaser)

                                             By:________________________________
                                                Name:
                                                Title:
                                                Address:

                                     B-2-3
<PAGE>
\                                     ANNEX C

                          PROJECTED PAYMENT SCHEDULE*

<TABLE>
<CAPTION>
      Semiannual Period Ending                 Projected Payment per Security
      ------------------------                 ------------------------------
<S>                                            <C>

</TABLE>

----------
*     The comparable yield and the schedule of projected payments are determined
      on the basis of an assumption of linear growth of the stock price and a
      constant dividend yield and are not determined for any purpose other than
      for the determination of interest accruals and adjustments thereof in
      respect of the Securities for United States federal income tax purposes.
      The comparable yield and the schedule of projected payments do not
      constitute a projection or representation regarding the amounts payable on
      the Securities.

                                      C-1<PAGE>

                                                                     EXHIBIT 4.2

                          REGISTRATION RIGHTS AGREEMENT

                  THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement") is made
and entered into as of June 16, 2003 between Mesa Air Group, Inc., a Nevada
corporation (the "Company"), the subsidiaries of the Company that are listed on
the signature pages hereto (collectively, and together with any entity that in
the future executes a supplemental indenture pursuant to which such entity
agrees to guarantee the Notes (as hereinafter defined), the "Guarantors" and,
together with the Company, the "Issuers") and Merrill Lynch & Co., as
representative of the Initial Purchasers listed on Schedule A of the Purchase
Agreement (the "Initial Purchasers"), dated June 11, 2003 (the "Purchase
Agreement"), between the Issuers and the Initial Purchasers. In order to induce
the Initial Purchasers to enter into the Purchase Agreement, the Issuers have
agreed to provide the registration rights set forth in this Agreement. The
execution of this Agreement is a condition to the closing under the Purchase
Agreement.

                  The Issuers agree with the Initial Purchasers, (i) for their
benefit as Initial Purchasers and (ii) for the benefit of the beneficial owners
(including the Initial Purchasers) from time to time of the Notes (as defined
herein), guaranteed by the Guarantors (the "Guarantees"), the Notes and the
Guarantees are collectively referenced to herein as the "Securities," and the
beneficial owners from time to time of the Underlying Common Stock (as defined
herein) issued upon conversion of the Notes (each of the foregoing a "Holder"
and together the "Holders"), as follows:

                  SECTION 1. Definitions. Capitalized terms used herein without
definition shall have their respective meanings set forth in the Purchase
Agreement. In addition to the terms that are defined elsewhere in this
Agreement, the following terms shall have the following meanings:

                  "Affiliate," with respect to any specified person, has the
meaning specified in Rule 144.

                  "Applicable Conversion Price" means, as of any date of
determination, the Applicable Principal Amount per $1,000 principal amount at
maturity of Notes as of such date of determination divided by the Conversion
Rate in effect as of such date of determination or, if no Notes are then
outstanding, the Conversion Rate that would be in effect were Notes then
outstanding.

                  "Applicable Principal Amount" means, as of any date of
determination, with respect to each $1,000 principal amount at maturity of Notes
means the sum of the initial issue price of such Notes ($397.27) plus accrued
original issue discount with respect to such Notes through such date of
determination or, if no Notes are then outstanding, such sum calculated as if
such Notes were then outstanding.

                  "Business Day" means each Monday, Tuesday, Wednesday, Thursday
and Friday that is not a day on which banking institutions in The City of New
York are authorized or obligated by law or executive order to close.
<PAGE>
                  "Common Stock" means any shares of the common stock, no par
value, of the Company and any other shares of common stock as may constitute
"Common Stock" for purposes of the Indenture, including the Underlying Common
Stock.

                  "Conversion Rate" has the meaning assigned to such term in the
Indenture.

                  "Damages Accrual Period" has the meaning specified in Section
2(e) hereof.

                  "Damages Payment Date" means each June 16 and December 16.

                  "Deferral Notice" has the meaning specified in Section 3(i)
hereof.

                  "Deferral Period" has the meaning specified in Section 3(i)
hereof.

                  "Effectiveness Deadline Date" has the meaning specified in
Section 2(a) hereof.

                  "Effectiveness Period" means the period of two years (the
holding period applicable to the Registrable Securities held by persons that are
not Affiliates of the Company under Rule 144(k) under the Securities Act) from
the Issue Date or such shorter period ending on the date that all Registrable
Securities have ceased to be Registrable Securities.

                  "Event" has the meaning specified in Section 2(e) hereof.

                  "Event Date" has the meaning specified in Section 2(e) hereof.

                  "Event Termination Date" has the meaning specified in Section
2(e) hereof.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended, and the rules and regulations of the SEC promulgated thereunder.

                  "Filing Deadline Date" has the meaning specified in Section
2(a) hereof.

                  "guarantee" means, as applied to any obligation, (i) a
guarantee (other than by endorsement of negotiable instruments for collection in
the ordinary course of business), direct or indirect, in any manner, of any part
or all of such obligation and (ii) an agreement, direct or indirect, contingent
or otherwise, the practical effect of which is to assure in any way the payment
or performance (or payment of damages in the event of non-performance) of all or
any part of such obligation, including, without limiting the foregoing, the
payment of amounts drawn down by letters of credit.

                  "Guarantors" has the meaning specified in the introductory
paragraph hereto.

                  "Holder" has the meaning specified in the second paragraph of
this Agreement.

                                       2
<PAGE>
                  "Indenture" means the Indenture dated as of the date hereof
between the Issuers and U.S. Bank National Association, as trustee, pursuant to
which the Notes are being issued.

                  "Initial Purchasers" mean Merrill Lynch, Pierce, Fenner &
Smith Incorporated and Raymond James & Associates, Inc.

                  "Initial Shelf Registration Statement" has the meaning
specified in Section 2(a) hereof.

                  "Issue Date" means June 16, 2003.

                  "Liquidated Damages Amount" has the meaning specified in
Section 2(e) hereof.

                  "Material Event" has the meaning specified in Section 3(i)
hereof.

                  "Notes" means the Senior Convertible Notes due 2023 of the
Company to be purchased pursuant to the Purchase Agreement.

                  "Notice and Questionnaire" means a written notice delivered to
the Issuers containing substantially the information called for by the Selling
Security Holder Notice and Questionnaire attached as Annex A to the Offering
Memorandum of the Company dated June 11, 2003 relating to the Notes.

                  "Notice Holder" means on any date, any Holder that has
delivered a Notice and Questionnaire to the Issuers on or prior to such date.

                  "Prospectus" means the prospectus included in any Registration
Statement (including, without limitation, a prospectus that discloses
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 415 promulgated under the
Securities Act), as amended or supplemented by any amendment or prospectus
supplement, including post-effective amendments, and all materials incorporated
by reference or explicitly deemed to be incorporated by reference in such
Prospectus.

                  "Purchase Agreement" has the meaning specified in the first
paragraph of this Agreement.

                  "Record Holder" means, with respect to any Damages Payment
Date relating to any Note or shares of Underlying Common Stock as to which any
Liquidated Damages Amount has accrued, the registered holder of such Note or
such shares of Underlying Common Stock, as the case may be, on the 15th day
immediately prior to the next succeeding Damages Payment Date.

                  "Registrable Securities" means the Notes and the Underlying
Common Stock until such securities have been converted or exchanged and, at all
times subsequent to any such conversion or exchange, any securities into or for
which such securities have been

                                       3
<PAGE>
converted or exchanged, and any security issued with respect thereto upon any
stock dividend, split, merger or similar event until, in the case of any such
security, the earliest of (i) its effective registration under the Securities
Act and resale in accordance with the Registration Statement covering it, (ii)
expiration of the holding period that would be applicable thereto under Rule
144(k) were it not held by an Affiliate of the Issuers, or (iii) its sale to the
public pursuant to Rule 144.

                  "Registration Expenses" has the meaning specified in Section 5
hereof.

                  "Registration Statement" means any registration statement of
the Company that covers any of the Registrable Securities pursuant to the
provisions of this Agreement, including the Prospectus, amendments and
supplements to such registration statement, including post-effective amendments,
all exhibits, and all materials incorporated by reference or explicitly deemed
to be incorporated by reference in such registration statement.

                  "Restated Principal Amount" has the meaning assigned to such
term in the Indenture.

                  "Restricted Securities" has the meaning assigned to such term
in Rule 144.

                  "Rule 144" means Rule 144 under the Securities Act, as such
Rule may be amended from time to time, or any similar or successor rule or
regulation hereafter adopted by the SEC having substantially the same effect as
such Rule.

                  "Rule 144A" means Rule 144A under the Securities Act, as such
Rule may be amended from time to time, or any similar or successor rule or
regulation hereafter adopted by the SEC having substantially the same effect as
such Rule.

                  "SEC" means the United States Securities and Exchange
Commission.

                  "Securities" has the meaning specified in the introductory
paragraphs hereto.

                  "Securities Act" means the Securities Act of 1933, as amended,
and the rules and regulations promulgated by the SEC thereunder.

                  "Shelf Registration Statement" has the meaning specified in
Section 2(a) hereof.

                  "Subsequent Shelf Registration Statement" has the meaning
specified in Section 2(b) hereof.

                  "Tax Event" has the meaning assigned to such term in the
Indenture.

                  "TIA" means the Trust Indenture Act of 1939, as amended.

                  "Trustee" means U.S. Bank National Association (or any
successor entity), the Trustee under the Indenture.

                                       4
<PAGE>
                  "Underlying Common Stock" means the Common Stock into which
the Notes are convertible or issued upon any such conversion.

SECTION 2.        Shelf Registration.

                  (a) The Issuers shall prepare and file or cause to be prepared
and filed with the SEC no later than a date which is 90 days after the Issue
Date (the "Filing Deadline Date") a Registration Statement for an offering to be
made on a delayed or continuous basis pursuant to Rule 415 of the Securities Act
(a "Shelf Registration Statement") registering the resale from time to time by
Holders of all of the Registrable Securities (the "Initial Shelf Registration
Statement"). The Initial Shelf Registration Statement shall be on Form S-3 or
another appropriate form permitting registration of such Registrable Securities
for resale by such Holders in accordance with the methods of distribution
reasonably elected by the Holders and set forth in the Initial Shelf
Registration Statement; provided that in no event will such method(s) of
distribution take the form of an underwritten offering of the Registrable
Securities without the prior agreement of the Issuers. The Issuers shall use
reasonable efforts to cause the Initial Shelf Registration Statement to be
declared effective under the Securities Act no later than the date (the
"Effectiveness Deadline Date") that is 180 days after the Issue Date, and to
keep the Initial Shelf Registration Statement (or any Subsequent Shelf
Registration Statement) continuously effective under the Securities Act until
the expiration of the Effectiveness Period. Each Holder that became a Notice
Holder on or prior to the date 10 Business Days prior to the time that the
Initial Shelf Registration Statement became effective shall be named as a
selling security holder in the Initial Shelf Registration Statement and the
related Prospectus in such a manner as to permit such Holder to deliver such
Prospectus to purchasers of Registrable Securities in accordance with applicable
law (other than laws not generally applicable to all such Holders).
Notwithstanding the foregoing, no Holder shall be entitled to have the
Registrable Securities held by it covered by such Shelf Registration Statement
unless such Holder has provided a Notice and Questionnaire in accordance with
Section 2(d) and is in compliance with Section 4. Except as described in the
Offering Memorandum, none of the Issuers' security holders (other than the
Holders of Registrable Securities) shall have the right to include any of the
Issuers' securities in the Shelf Registration Statement.

                  (b) If the Initial Shelf Registration Statement or any
Subsequent Shelf Registration Statement ceases to be effective for any reason at
any time during the Effectiveness Period, the Issuers shall use reasonable
efforts to obtain the prompt withdrawal of any order suspending the
effectiveness thereof, and in any event shall within 30 days of such cessation
of effectiveness amend the Shelf Registration Statement in a manner reasonably
expected by the Issuers to obtain the withdrawal of the order suspending the
effectiveness thereof, or file an additional Shelf Registration Statement
covering all of the securities that as of the date of such filing are
Registrable Securities (a "Subsequent Shelf Registration Statement"). If a
Subsequent Shelf Registration Statement is filed, the Issuers shall use
reasonable efforts to cause the Subsequent Shelf Registration Statement to
become effective as promptly as is reasonably practicable after such filing or,
if filed during a Deferral Period, after the expiration of such Deferral Period,
and to keep such Registration Statement (or subsequent Shelf Registration
Statement) continuously effective until the end of the Effectiveness Period.

                                       5
<PAGE>
                  (c) The Issuers shall supplement and amend the Shelf
Registration Statement if required by the rules, regulations or instructions
applicable to the registration form used by the Issuers for such Shelf
Registration Statement, if required by the Securities Act or, to the extent to
which the Issuers do not reasonably object, as reasonably requested by the
Initial Purchasers or by the Trustee on behalf of the registered Holders.

                  (d) Each Holder of Registrable Securities agrees that if such
Holder wishes to sell Registrable Securities pursuant to a Shelf Registration
Statement and related Prospectus, it will do so only in accordance with this
Section 2(d) and Section 3(i) and Section 4. Each Holder of Registrable
Securities wishing to sell Registrable Securities pursuant to a Shelf
Registration Statement and related Prospectus agrees to deliver a Notice and
Questionnaire to the Issuers at least five (5) Business Days prior to any
intended distribution of Registrable Securities under the Shelf Registration
Statement. From and after the date the Initial Shelf Registration Statement is
declared effective, the Issuers shall, as promptly as is reasonably practicable
after the date a Notice and Questionnaire is delivered, (i) if required by
applicable law, file with the SEC a post-effective amendment to the Shelf
Registration Statement or prepare and, if required by applicable law, file a
supplement to the related Prospectus or a supplement or amendment to any
document incorporated therein by reference or file any other document required
by the SEC so that the Holder delivering such Notice and Questionnaire is named
as a selling security holder in the Shelf Registration Statement and the related
Prospectus in such a manner as to permit such Holder to deliver such Prospectus
to purchasers of the Registrable Securities in accordance with applicable law
(other than laws not generally applicable to all Holders of Registrable
Securities wishing to sell Registrable Securities pursuant to the Shelf
Registration Statement and related Prospectus) and, if the Issuers shall file a
post-effective amendment to the Shelf Registration Statement, use reasonable
efforts to cause such post-effective amendment to be declared effective under
the Securities Act as promptly as is reasonably practicable; (ii) provide such
Holder copies of any documents filed pursuant to Section 2(d)(i); and (iii)
notify such Holder as promptly as is reasonably practicable after the
effectiveness under the Securities Act of any post-effective amendment filed
pursuant to Section 2(d)(i); provided that if such Notice and Questionnaire is
delivered during a Deferral Period, the Issuers shall so inform the Holder
delivering such Notice and Questionnaire and shall take the actions set forth in
clauses (i), (ii) and (iii) above upon expiration of the Deferral Period in
accordance with Section 3(i), provided further that if under applicable law the
Issuers have more than one option as to the type or manner of making any such
filing, it will make the required filing or filings in the manner or of a type
that the Company reasonably expects will result in the earliest availability of
the Prospectus for effecting resales of Registrable Securities. Notwithstanding
anything contained herein to the contrary, the Issuers shall be under no
obligation to name any Holder that is not a Notice Holder as a selling security
holder in any Registration Statement or related Prospectus; provided, however,
that any Holder that becomes a Notice Holder pursuant to the provisions of
Section 2(d) of this Agreement (whether or not such Holder was a Notice Holder
at the time the Registration Statement was initially declared effective) shall
be named as a selling security holder in the Registration Statement or related
Prospectus subject to and in accordance with the requirements of this Section
2(d).

                                       6
<PAGE>
                  (e) The parties hereto agree that the Holders of Registrable
Securities will suffer damages, and that it would not be feasible to ascertain
the extent of such damages with precision, if (i) the Initial Shelf Registration
Statement has not been filed on or prior to the Filing Deadline Date, (ii) the
Initial Shelf Registration Statement has not been declared effective under the
Securities Act on or prior to the Effectiveness Deadline Date, or (iii) the
aggregate duration of Deferral Periods in any period exceeds the number of days
permitted in respect of such period pursuant to Section 3(i) hereof (each of the
events of a type described in any of the foregoing clauses (i) through (iii) is
individually referred to herein as an "Event," and the Filing Deadline Date in
the case of clause (i), the Effectiveness Deadline Date in the case of clause
(ii), and the date on which the aggregate duration of Deferral Periods in any
period exceeds the number of days permitted by Section 3(i) hereof in the case
of clause (iii), being referred to herein as an "Event Date"). Events shall be
deemed to continue until the "Event Termination Date," which shall be the
following dates with respect to the respective types of Events: the date the
Initial Shelf Registration Statement is filed in the case of an Event of the
type described in clause (i), the date the Initial Shelf Registration Statement
is declared effective under the Securities Act in the case of an Event of the
type described in clause (ii), and termination of the Deferral Period that
caused the limit on the aggregate duration of Deferral Periods in a period set
forth in Section 3(i) to be exceeded in the case of the commencement of an Event
of the type described in clause (iii).

                  Accordingly, commencing on (and including) any Event Date and
ending on (but excluding) the next date after an Event Termination Date (a
"Damages Accrual Period"), the Issuers agree to pay, as liquidated damages and
not as a penalty, an amount (the "Liquidated Damages Amount"), payable on the
Damages Payment Dates to Record Holders of then outstanding Notes that are
Registrable Securities or of then outstanding shares of Underlying Common Stock
issued upon conversion of Notes that are Registrable Securities, as the case may
be, accruing, for each portion of such Damages Accrual Period beginning on and
including a Damages Payment Date (or, in respect of the first time that the
Liquidation Damages Amount is to be paid to Holders on a Damages Payment Date as
a result of the occurrence of any particular Event, from the Event Date) and
ending on but excluding the first to occur of (A) the date of the end of the
Damages Accrual Period or (B) the next Damages Payment Date, at a rate per annum
equal to 0.25% for the first 90-day period from the Event Date, and thereafter
at a rate per annum equal to 0.50% of the aggregate Applicable Principal Amount
of such Notes, the aggregate Applicable Conversion Price of the shares of
Underlying Common Stock and the Restated Principal Amount of the Semi-annual
Coupon Notes, as the case may be, in each case determined as of the Business Day
immediately preceding the next Damages Payment Date; provided that any
Liquidated Damages Amount accrued with respect to any Note or portion thereof
called for redemption on a redemption date or converted into Underlying Common
Stock on a conversion date or to Semi-annual Coupon Notes prior to the Damages
Payment Date shall, in any such event, be paid instead to the Holder who
submitted such Note or portion thereof for redemption or conversion on the
applicable redemption date or conversion date, as the case may be, on such date
(or promptly following the conversion date, in the case of conversion).
Notwithstanding the foregoing, no Liquidated Damages Amounts shall accrue as to
any Registrable Security from and after the earlier of (x) the date such
security is no longer a Registrable Security and (y) expiration of the
Effectiveness Period. The rate of accrual of the Liquidated Damages Amount with
respect to any period shall not exceed the rate provided for in this paragraph
notwithstanding

                                       7
<PAGE>
the occurrence of multiple concurrent Events. Following the cure of all Events
requiring the payment by the Issuers of Liquidated Damages Amounts to the
Holders of Registrable Securities pursuant to this Section, the accrual of
Liquidated Damages Amounts will cease (without in any way limiting the effect of
any subsequent Event requiring the payment of the Liquidated Damages Amount by
the Issuers).

                  The Trustee, subject to the applicable provisions of the
Indenture, shall be entitled, on behalf of Holders of Notes or Underlying Common
Stock, to seek any available remedy for the enforcement of this Agreement,
including for the payment of any Liquidated Damages Amount. Notwithstanding the
foregoing, the parties agree that the sole monetary damages payable for a
violation of the terms of this Agreement with respect to which liquidated
damages are expressly provided shall be such liquidated damages. Nothing shall
preclude a Notice Holder or Holder of Registrable Securities from pursuing or
obtaining specific performance or other equitable relief with respect to this
Agreement.

                  All of the Issuers' obligations set forth in this Section 2(e)
that are outstanding with respect to any Registrable Security at the time such
security ceases to be a Registrable Security shall survive until such time as
all such obligations with respect to such security have been satisfied in full
(notwithstanding termination of this Agreement pursuant to Section 8(k)).

                  The parties hereto agree that the liquidated damages provided
for in this Section 2(e) constitute a reasonable estimate of the damages that
may be incurred by Holders of Registrable Securities by reason of the failure of
the Shelf Registration Statement to be filed or declared effective or available
for effecting resales of Registrable Securities in accordance with the
provisions hereof.

                  SECTION 3. Registration Procedures. In connection with the
registration obligations of the Issuers under Section 2 hereof, during the
Effectiveness Period the Issuers shall:

                  (a) Before filing any Registration Statement or Prospectus or
any amendments or supplements (other than supplements that do nothing more
substantive than name one or more Notice Holders as selling security holders)
thereto with the SEC, furnish to the Initial Purchasers copies of all such
documents proposed to be filed and use reasonable efforts to reflect in each
such document when so filed with the SEC such comments as the Initial Purchasers
reasonably shall propose within three (3) Business Days of the delivery of such
copies to the Initial Purchasers.

                  (b) Subject to Section 3(i), prepare and file with the SEC
such amendments and post-effective amendments to each Registration Statement as
may be necessary to keep such Registration Statement continuously effective for
the applicable period specified in Section 2(a); cause the related Prospectus to
be supplemented by any required Prospectus supplement, and as so supplemented to
be filed pursuant to Rule 424 (or any similar provisions then in force) under
the Securities Act; and use reasonable efforts to comply with the provisions of
the Securities Act applicable to it with respect to the disposition of all
securities covered by such Registration Statement during the Effectiveness

                                       8
<PAGE>
Period in accordance with the intended methods of disposition by the sellers
thereof set forth in such Registration Statement as so amended or such
Prospectus as so supplemented.

                  (c) As promptly as reasonably practicable give notice to the
Notice Holders and the Initial Purchasers (i) when any Prospectus, Prospectus
supplement, Registration Statement or post-effective amendment to a Registration
Statement has been filed with the SEC and, with respect to a Registration
Statement or any post-effective amendment, when the same has been declared
effective (provided, however, that the Issuers shall not be required by this
clause (i) to notify (A) the Initial Purchasers of the filing of a Prospectus
supplement that does nothing more substantive than name one or more Notice
Holders as selling security holders or (B) any Notice Holder of the filing of a
Prospectus supplement that does nothing more substantive than name one or more
other Notice Holders as selling security holders), (ii) of any request,
following the effectiveness of the Initial Shelf Registration Statement under
the Securities Act, by the SEC or any other federal or state governmental
authority for amendments or supplements to any Registration Statement or related
Prospectus or for additional information, (iii) of the issuance by the SEC or
any other federal or state governmental authority of any stop order or
injunction suspending or enjoining the use of any Prospectus or the
effectiveness of any Registration Statement or the initiation or threatening of
any proceedings for that purpose, (iv) of the receipt by the Issuers of any
notification with respect to the suspension of the qualification or exemption
from qualification of any of the Registrable Securities for sale in any
jurisdiction or the initiation or threatening of any proceeding for such
purpose, (v) of the occurrence of (but not the nature of or details concerning)
a Material Event (provided, however, that no notice by the Issuers shall be
required pursuant to this clause (v) in the event that the Issuers either
promptly file a Prospectus supplement to update the Prospectus or a Current
Report on Form 8-K or other appropriate Exchange Act report that is incorporated
by reference into the Registration Statement, which, in either case, contains
the requisite information with respect to such Material Event that results in
such Registration Statement no longer containing any untrue statement of
material fact or omitting to state a material fact necessary to make the
statements contained therein not misleading) and (vi) of the determination by
the Issuers that a post-effective amendment to a Registration Statement will be
filed with the SEC, which notice may, at the discretion of the Issuers (or as
required pursuant to Section 3(i)), state that it constitutes a Deferral Notice,
in which event the provisions of Section 3(i) shall apply.

                  (d) Use reasonable efforts to obtain the withdrawal of any
order suspending the effectiveness of a Registration Statement or the lifting of
any suspension of the qualification (or exemption from qualification) of any of
the Registrable Securities for sale in any jurisdiction in which they have been
qualified for sale, in either case at the earliest possible moment or, if any
such order or suspension is made effective during any Deferral Period, at the
earliest possible moment after the expiration of such Deferral Period.

                  (e) If reasonably requested by the Initial Purchasers or any
Notice Holder, as promptly as reasonably practicable incorporate in a Prospectus
supplement or post-effective amendment to a Registration Statement such
information as the Initial Purchasers or such Notice Holder shall, on the basis
of a written opinion of nationally recognized counsel experienced in such
matters, determine to be required to be included therein by applicable law and
make any required filings of such Prospectus supplement or

                                       9
<PAGE>
such post-effective amendment; provided that the Issuers shall not be required
to take any actions under this Section 3(e) that are not, in the reasonable
opinion of counsel for the Issuers, in compliance with applicable law.

                  (f) As promptly as reasonably practicable after the filing of
such documents with the SEC, furnish to each Notice Holder and the Initial
Purchasers, upon their request and without charge, at least one conformed copy
of the Registration Statement and any amendment thereto, including financial
statements, but excluding schedules, all documents incorporated or deemed to be
incorporated therein by reference and all exhibits (unless requested in writing
to the Issuers by such Notice Holder or the Initial Purchasers, as the case may
be).

                  (g) During the Effectiveness Period, deliver to each Notice
Holder in connection with any sale of Registrable Securities pursuant to a
Registration Statement, without charge, as many copies of the Prospectus or
Prospectuses relating to such Registrable Securities (including each preliminary
prospectus) and any amendment or supplement thereto as such Notice Holder may
reasonably request; and the Issuers hereby consent (except during such periods
that a Deferral Notice is outstanding and has not been revoked) to the use of
such Prospectus or each amendment or supplement thereto by each Notice Holder in
connection with any offering and sale of the Registrable Securities covered by
such Prospectus or any amendment or supplement thereto in the manner set forth
therein.

                  (h) Subject to Section 3(i), prior to any public offering of
the Registrable Securities pursuant to the Shelf Registration Statement, use
reasonable efforts to register or qualify or cooperate with the Notice Holders
in connection with the registration or qualification (or exemption from such
registration or qualification) of such Registrable Securities for offer and sale
under the securities or Blue Sky laws of such jurisdictions within the United
States as any Notice Holder reasonably requests in writing (which request may be
included in the Notice and Questionnaire), it being agreed that no such
registration or qualification will be made unless so requested; prior to any
public offering of the Registrable Securities pursuant to the Shelf Registration
Statement, use reasonable efforts to keep each such registration or
qualification (or exemption therefrom) effective during the Effectiveness Period
in connection with such Notice Holder's offer and sale of Registrable Securities
pursuant to such registration or qualification (or exemption therefrom) and do
any and all other acts or things reasonably necessary to enable the disposition
in such jurisdictions of such Registrable Securities in the manner set forth in
the relevant Registration Statement and the related Prospectus; provided that
the Issuers will not be required to (i) qualify as a foreign corporation or as a
dealer in securities in any jurisdiction where it is not otherwise qualified or
(ii) take any action that would subject it to general service of process in
suits or to taxation in any such jurisdiction where it is not then so subject.

                  (i) Upon (A) the issuance by the SEC of a stop order
suspending the effectiveness of the Shelf Registration Statement or the
initiation of proceedings with respect to the Shelf Registration Statement under
Section 8(d) or 8(e) of the Securities Act, (B) the occurrence of any event or
the existence of any fact (a "Material Event") as a result of which any
Registration Statement shall contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary to
make the statements

                                       10
<PAGE>
therein not misleading, or any Prospectus shall contain any untrue statement of
a material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading (including, in any such case, as a
result of the non-availability of financial statements), or (C) the occurrence
or existence of any pending corporate development that, in the discretion of the
Issuers, makes it appropriate to suspend the availability of the Shelf
Registration Statement and the related Prospectus, (i) in the case of clause (B)
above, subject to the next sentence, as promptly as practicable prepare and file
a post-effective amendment to such Registration Statement or a supplement to the
related Prospectus or any document incorporated therein by reference or file any
other required document that would be incorporated by reference into such
Registration Statement and Prospectus so that such Registration Statement does
not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the statements
therein not misleading, and such Prospectus does not contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading, as thereafter
delivered to the purchasers of the Registrable Securities being sold thereunder,
and, in the case of a post-effective amendment to a Registration Statement,
subject to the next sentence, use reasonable efforts to cause it to be declared
effective as promptly as is reasonably practicable, and (ii) give notice to the
Notice Holders that the availability of the Shelf Registration Statement is
suspended (a "Deferral Notice") and, upon receipt of any Deferral Notice, each
Notice Holder agrees not to sell any Registrable Securities pursuant to the
Registration Statement until such Notice Holder's receipt of copies of the
supplemented or amended Prospectus provided for in clause (i) above, or until it
is advised in writing by the Issuers that the Prospectus may be used, and has
received copies of any additional or supplemental filings that are incorporated
or deemed incorporated by reference in such Prospectus. The Issuers will use
reasonable efforts to ensure that the use of the Prospectus may be resumed (x)
in the case of clause (A) above, as promptly as is practicable, (y) in the case
of clause (B) above, as soon as, in the sole judgment of the Issuers, public
disclosure of such Material Event would not be prejudicial to or contrary to the
interests of the Issuers or, if necessary to avoid unreasonable burden or
expense, as soon as reasonably practicable thereafter and (z) in the case of
clause (C) above, as soon as, in the discretion of the Issuers, such suspension
is no longer appropriate. So long as the period during which the availability of
the Registration Statement and any Prospectus is suspended (the "Deferral
Period") does not exceed forty-five (45) days during any three (3) month period
or one hundred and twenty (120) days during any twelve (12) month period, the
Issuers shall not incur any obligation to pay liquidated damages pursuant to
Section 2(e).

                  (j) If reasonably requested in writing in connection with a
disposition of Registrable Securities pursuant to a Registration Statement, make
reasonably available for inspection during normal business hours by a
representative for the Notice Holders of such Registrable Securities and any
broker-dealers, attorneys and accountants retained by such Notice Holders, all
relevant financial and other records, pertinent corporate documents and
properties of the Issuers and its subsidiaries, and cause the appropriate
executive officers, directors and designated employees of the Issuers and its
subsidiaries to make reasonably available for inspection during normal business
hours all relevant information reasonably requested by such representative for
the Notice Holders or any such broker-dealers, attorneys

                                       11
<PAGE>
or accountants in connection with such disposition, in each case as is customary
for similar "due diligence" examinations; provided, however, that such persons
shall first agree in writing with the Issuers that any information that is
reasonably designated by the Issuers in writing as confidential at the time of
delivery of such information shall be kept confidential by such persons and
shall be used solely for the purposes of exercising rights under this Agreement,
unless (i) disclosure of such information is required by court or administrative
order or is necessary to respond to inquiries of regulatory authorities, (ii)
disclosure of such information is required by law (including any disclosure
requirements pursuant to federal securities laws in connection with the filing
of any Registration Statement or the use of any Prospectus referred to in this
Agreement), (iii) such information becomes generally available to the public
other than as a result of a disclosure or failure to safeguard by any such
person or (iv) such information becomes available to any such person from a
source other than the Issuers and such source is not bound by a confidentiality
agreement or other obligation of confidentiality; and provided further that the
foregoing inspection and information gathering shall, to the greatest extent
possible, be coordinated on behalf of all the Notice Holders and the other
parties entitled thereto by the counsel referred to in Section 5.

                  (k) Comply with all applicable rules and regulations of the
SEC and make generally available to its security holders earning statements
(which need not be audited) satisfying the provisions of Section 11(a) of the
Securities Act and Rule 158 thereunder (or any similar rule promulgated under
the Securities Act) no later than the time period prescribed by the SEC for
filing a Form 10-Q after the end of any 12-month period (or the time period
prescribed by the SEC for filing a Form 10-K after the end of any 12-month
period if such period is a fiscal year) commencing on the first day of the first
fiscal quarter of the Issuers commencing after the effective date of a
Registration Statement, which statements shall cover said 12-month periods.

                  (l) Cooperate with each Notice Holder to facilitate the timely
preparation and delivery of certificates representing Registrable Securities
sold pursuant to a Registration Statement, and cause such Registrable Securities
to be in such denominations as are permitted by the Indenture and registered in
such names as such Notice Holder may request in writing at least two Business
Days prior to any sale of such Registrable Securities.

                  (m) Provide a CUSIP number for all Registrable Securities
covered by each Registration Statement not later than the effective date of such
Registration Statement and provide the Trustee for the Notes and the transfer
agent for the Common Stock with certificates for the Registrable Securities that
are in a form eligible for deposit with The Depository Trust Company.

                  (n) Make reasonable effort to provide such information as is
required for any filings required to be made with the National Association of
Securities Dealers, Inc.

                  (o) Upon (i) the filing of the Initial Shelf Registration
Statement and (ii) the effectiveness of the Initial Shelf Registration
Statement, announce the same, in each case by release to Businesswire, Reuters
Economic Services, Bloomberg Business News or any other means of dissemination
reasonably expected to make such information known publicly.

                                       12
<PAGE>
                  (p) Take all actions necessary, or reasonably requested by the
holders of a majority of the Registrable Securities being sold, in order to
expedite or facilitate disposition of such Registrable Securities; provided that
the Issuers shall not be required to take any action in connection with an
underwritten offering without their consent.

                  (q) Cause the Indenture to be qualified under the TIA not
later than the effective date of any Registration Statement; and in connection
therewith, cooperate with the Trustee to effect such changes to the Indenture as
may be required for the Indenture to be so qualified in accordance with the
terms of the TIA and execute, and use reasonable efforts to cause the Trustee to
execute, all documents as may be required to effect such changes, and all other
forms and documents required to be filed with the SEC to enable the Indenture to
be so qualified in a timely manner.

                  SECTION 4. Holder's Obligations. Each Holder agrees, by
acquisition of the Registrable Securities, that no Holder of Registrable
Securities shall be entitled to sell any of such Registrable Securities pursuant
to a Registration Statement or to receive a Prospectus relating thereto, unless
such Holder has furnished the Issuers with a Notice and Questionnaire as
required pursuant to Section 2(d) hereof (including the information required to
be included in such Notice and Questionnaire) and the information set forth in
the next sentence. Each Notice Holder agrees promptly to furnish to the Issuers
all information required to be disclosed in order to make the information
previously furnished to the Issuers by such Notice Holder not misleading, any
other information regarding such Notice Holder and the distribution of such
Registrable Securities as may be required to be disclosed in the Registration
Statement under applicable law or pursuant to SEC comments and any information
otherwise required by the Issuers to comply with applicable law or regulations.
Each Holder further agrees, following termination of the Effectiveness Period,
to notify the Issuers, within 10 Business Days of a request, of the amount of
Registrable Securities sold pursuant to the Registration Statement and, in the
absence of a response, the Issuers may assume that all of the Holder's
Registrable Securities were so sold.

                  SECTION 5. Registration Expenses. The Issuers shall bear all
fees and expenses incurred in connection with the performance by the Company of
its obligations under Sections 2 and 3 of this Agreement whether or not any of
the Registration Statements are declared effective. Such fees and expenses shall
include, without limitation, (i) all registration and filing fees (including,
without limitation, fees and expenses (x) with respect to filings required to be
made with the National Association of Securities Dealers, Inc. and (y) of
compliance with federal and state securities or Blue Sky laws to the extent such
filings or compliance are required pursuant to this Agreement (including,
without limitation, reasonable fees and disbursements of the counsel specified
in the next sentence in connection with Blue Sky qualifications of the
Registrable Securities under the laws of such jurisdictions as the Notice
Holders of a majority of the Registrable Securities being sold pursuant to a
Registration Statement may designate)), (ii) printing expenses (including,
without limitation, expenses of printing certificates for Registrable Securities
in a form eligible for deposit with The Depository Trust Company), (iii)
duplication expenses relating to copies of any Registration Statement or
Prospectus delivered to any Holders hereunder, (iv) fees and disbursements of
counsel for the Issuers in connection with the Shelf Registration Statement, and
(v) reasonable fees and disbursements of the Trustee and its counsel and of the
registrar

                                       13
<PAGE>
and transfer agent for the Common Stock. In addition, the Issuers shall bear or
reimburse the Notice Holders for the fees and disbursements of one firm of legal
counsel for the Holders, which shall, upon the written consent of the Initial
Purchasers (which shall not be unreasonably withheld), be another nationally
recognized law firm experienced in securities law matters designated by the
Issuers. In addition, the Issuers shall pay the internal expenses of the Issuers
(including, without limitation, all salaries and expenses of officers and
employees performing legal or accounting duties), the expense of any annual
audit, the fees and expenses incurred in connection with the listing of the
Registrable Securities on any securities exchange on which the same securities
of the Issuers are then listed and the fees and expenses of any person,
including special experts, retained by the Issuers.

                  SECTION 6. Indemnification; Contribution.

                  (a) The Issuers agree to indemnify and hold harmless the
Initial Purchasers and each holder of Registrable Securities and each person, if
any, who controls the Initial Purchasers or any holder of Registrable Securities
within the meaning of either Section 15 of the Securities Act or Section 20 of
the Exchange Act, as follows:

                  (i) against any and all loss, liability, claim, damage and
         expense whatsoever, as incurred, arising out of any untrue statement or
         alleged untrue statement of a material fact contained in the
         Registration Statement (or any amendment thereto), or the omission or
         alleged omission therefrom of a material fact required to be stated
         therein or necessary in order to make the statements therein, in light
         of the circumstances under which they were made, not misleading or
         arising out of any untrue statement or alleged untrue statement of a
         material fact included in any preliminary prospectus or the Prospectus
         (or any amendment or supplement thereto), or the omission or alleged
         omission therefrom of a material fact required to be stated therein or
         necessary in order to make the statements therein, in the light of the
         circumstances under which they were made, not misleading;

                  (ii) against any and all loss, liability, claim, damage and
         expense whatsoever, as incurred, to the extent of the aggregate amount
         paid in settlement of any litigation, or any investigation or
         proceeding by any governmental agency or body, commenced or threatened,
         or of any claim whatsoever based upon any such untrue statement or
         omission, or any such alleged untrue statement or omission, provided
         that (subject to Section 6(d) below) any such settlement is effected
         with the prior written consent of the Company; and

                  (iii) subject to Section 6(c) below, against any and all
         expense whatsoever, as incurred (including the fees and disbursements
         of counsel), reasonably incurred in investigating, preparing or
         defending against any litigation, or any investigation or proceeding by
         any governmental agency or body, commenced or threatened, or any claim
         whatsoever based upon any such untrue statement or omission, or any
         such alleged untrue statement or omission, to the extent that any such
         expense is not paid under (i) or (ii) above;

                                       14
<PAGE>
provided, however, that this indemnity agreement shall not apply to any loss,
liability, claim, damage or expense to the extent arising out of any untrue
statement or omission or alleged untrue statement or omission made in reliance
upon and in conformity with written information furnished to the Issuers by or
on behalf of the Initial Purchasers, such holder of Registrable Securities
(which also acknowledges the indemnity provisions herein) or any person, if any,
who controls the Initial Purchasers or any such holder of Registrable Securities
expressly for use in the Registration Statement (or any amendment thereto), or
any preliminary prospectus or the Prospectus (or any amendment or supplement
thereto); provided further that this indemnity agreement shall not apply to any
loss, liability, claim, damage or expense (1) arising from an offer or sale of
Registrable Securities occurring during a Deferral Period, if a Deferral Notice
was given to such Notice Holder in accordance with Section 8(c), or (2) if the
Holder fails to deliver at or prior to the written confirmation of sale, the
most recent Prospectus, as amended or supplemented, and such Prospectus, as
amended or supplemented, would have corrected such untrue statement or omission
or alleged untrue statement or omission of a material fact and the delivery
thereof was required by law.

                  (b) In connection with any Shelf Registration in which a
holder, including, without limitation, the Initial Purchasers, of Registrable
Securities is participating, in furnishing information relating to such holder
of Registrable Securities to the Issuers in writing expressly for use in such
Registration Statement, any preliminary prospectus, the Prospectus or any
amendments or supplements thereto, the holders of such Registrable Securities
agree, severally and not jointly, to indemnify and hold harmless the Initial
Purchasers and each person, if any, who controls the Initial Purchasers within
the meaning of either Section 15 of the Securities Act or Section 20 of the
Exchange Act and the Issuers, and each person, if any, who controls the Issuers
within the meaning of either such Section, against any and all loss, liability,
claim, damage and expense described in the indemnity contained in subsection (a)
of this Section, as incurred, but only with respect to untrue statements or
omissions, or alleged untrue statements or omissions, made in the Registration
Statement (or any amendment thereto) or any preliminary prospectus or the
Prospectus (or any amendment or supplement thereto) in reliance upon and in
conformity with written information furnished to the Issuers by or on behalf of
such holder of Registrable Securities (which also acknowledges the indemnity
provisions herein) or any person, if any, who controls any such holder of
Registrable Securities expressly for use in the Registration Statement (or any
amendment thereto) or such preliminary prospectus or the Prospectus (or any
amendment or supplement thereto).

                  The Initial Purchasers agree to indemnify and hold harmless
the Issuers, the holders of Registrable Securities, and each person, if any, who
controls the Issuers or any holder of Registrable Securities within the meaning
of either Section 15 of the Securities Act or Section 20 of the Exchange Act
against any and all loss, liability, claim, damage and expense described in the
indemnity contained in subsection (a) of this Section, as incurred, but only
with respect to untrue statements or omissions, or alleged untrue statements or
omissions, made in the Registration Statement (or any amendment thereto) or any
preliminary prospectus or the Prospectus (or any amendment or supplement
thereto) in reliance upon and in conformity with written information furnished
to the Issuers by or on behalf of the Initial Purchasers expressly for use in
the Registration Statement (or any

                                       15
<PAGE>
amendment thereto) or such preliminary prospectus or the Prospectus (or any
amendment or supplement thereto).

                  (c) Each indemnified party shall give notice as promptly as
reasonably practicable to each indemnifying party of any action or proceeding
commenced against it in respect of which indemnity may be sought hereunder, but
failure to so notify an indemnifying party shall not relieve such indemnifying
party from any liability hereunder to the extent it is not materially prejudiced
as a result thereof and in any event shall not relieve it from any liability
which it may have otherwise than on account of these indemnity provisions. The
indemnifying party, upon request of the indemnified party, shall retain counsel
reasonably satisfactory to the indemnified party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding and
shall pay the fees and disbursements of such counsel related to such proceeding.
In any such proceeding, any indemnified party shall have the right to retain a
separate firm as its own counsel, but the fees and expenses of such counsel
shall be at the expense of such indemnified party unless (i) the indemnifying
party and the indemnified party shall have mutually agreed to the retention of
such counsel or (ii) the named parties to any such proceeding (including any
impleaded parties) include both the indemnifying party and the indemnified party
and representation of both parties by the same counsel would be inappropriate
due to actual or potential differing interests between them. It is understood
that the indemnifying party shall not, in respect of the legal expenses of any
indemnified party in connection with any proceeding or related proceedings in
the same jurisdiction, be liable for (A) the reasonable fees and expenses of
more than one firm (in addition to any local counsel) for the Initial
Purchasers, Holders of Registrable Securities, and all persons, if any, who
control the Initial Purchasers or Holders of Registrable Securities within the
meaning of either Section 15 of the Securities Act or Section 20 of the Exchange
Act or (B) the reasonable fees and expenses of more than one firm (in addition
to any local counsel) for the Issuers, their directors, and each person, if any,
who controls the Issuers within the meaning of either such Section, and that all
such reasonable fees and expenses shall be reimbursed as they are incurred. In
the event a separate firm is retained for the Initial Purchasers, Holders of
Registrable Securities, and control persons of the Initial Purchasers and
Holders of Registrable Securities, such firm shall be designated in writing by
the Initial Purchasers. In the event a separate firm is retained for the
Issuers, and such directors, officers and control persons of the Issuers, such
firm shall be designated in writing by the Issuers. No indemnifying party shall,
without the prior written consent of the indemnified parties, settle or
compromise or consent to the entry of any judgment with respect to any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever in respect of which
indemnification or contribution could be sought under this Section 6 (whether or
not the indemnified parties are actual or potential parties thereto), unless
such settlement, compromise or consent (i) includes an unconditional release of
each indemnified party from all liability arising out of such litigation,
investigation, proceeding or claim and (ii) does not include a statement as to
or an admission of fault, culpability or a failure to act by or on behalf of any
indemnified party.

                  (d) If at any time an indemnified party shall have requested
an indemnifying party to reimburse the indemnified party for fees and expenses
of counsel, such indemnifying party agrees that it shall be liable for any
settlement of the nature contemplated

                                       16
<PAGE>
by Section 6(a)(ii) effected without its written consent if (i) such settlement
is entered into more than 60 days after receipt by such indemnifying party of
aforesaid request, (ii) such indemnifying party shall have received notice of
the terms of such settlement at least 45 days prior to such settlement being
entered into and (iii) such indemnifying party shall not have reimbursed such
indemnified party in accordance with such request prior to the date of such
settlement; provided that an indemnifying party shall not be liable for any such
settlement effected without its consent if such indemnifying party (1)
reimburses such indemnified party in accordance with such request to the extent
it considers such request to be reasonable and (2) provides written notice to
the indemnified party describing any unpaid balance it believes is unreasonable
and the reasons therefor, in each case prior to the date of such settlement.

                  (e) If the indemnification to which an indemnified party is
entitled under this Section 6 is for any reason unavailable to or insufficient
although applicable in accordance with its terms to hold harmless an indemnified
party in respect of any losses, liabilities, claims, damages or expenses
referred to therein, then each indemnifying party shall contribute to the
aggregate amount of such losses, liabilities, claims, damages and expenses
incurred by such indemnified party, as incurred, in such proportion as is
appropriate to reflect the relative fault of the indemnifying party or parties
on the one hand and of the indemnified party on the other hand in connection
with the statements or omissions which resulted in such losses, liabilities,
claims, damages or expenses, as well as any other relevant equitable
considerations.

                  The relative fault of the Issuers on the one hand and the
holders of the Registrable Securities or the Initial Purchasers on the other
hand shall be determined by reference to, among other things, whether any such
untrue or alleged untrue statement of a material fact or omission or alleged
omission to state a material fact relates to information supplied by the Issuers
or by the holder of the Registrable Securities or the Initial Purchasers and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.

                  The parties hereto agree that it would not be just and
equitable if contribution pursuant to this Section 6(e) were determined by pro
rata allocation or by any other method of allocation which does not take account
of the equitable considerations referred to above in this Section 6(e). The
aggregate amount of losses, liabilities, claims, damages, and expenses incurred
by an indemnified party and referred to above in this Section 6(e) shall be
deemed to include any out-of-pocket legal or other expenses reasonably incurred
by such indemnified party in investigating, preparing or defending against any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever based upon any such
untrue or alleged untrue statement or omission or alleged omission.

                  Notwithstanding the provisions of this Section 6, neither the
holder of any Registrable Securities nor the Initial Purchasers shall be
required to indemnify or contribute any amount in excess of the amount by which
the total price at which the Registrable Securities sold by such holder of
Registrable Securities or by the Initial Purchasers, as the case may be, exceeds
the amount of any damages that such holder of Registrable Securities

                                       17
<PAGE>
or the Initial Purchasers has otherwise been required to pay by reason of such
untrue or alleged untrue statement or omission or alleged omission.

                  No person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation.

                  For purposes of this Section 6(e), each person, if any, who
controls the Initial Purchasers or any holder of Registrable Securities within
the meaning of Section 15 of the Securities Act or Section 20 of the Exchange
Act shall have the same rights to contribution as the Initial Purchasers or such
holder, and each person, if any, who controls the Issuers within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act shall have
the same rights to contribution as the Issuers.

                  SECTION 7. Information Requirements. The Issuers covenant
that, if at any time before the end of the Effectiveness Period the Issuers are
not subject to the reporting requirements of the Exchange Act, they will
cooperate with any Holder of Registrable Securities and take such further
reasonable action as any Holder of Registrable Securities may reasonably request
in writing (including, without limitation, making such reasonable
representations as any such Holder may reasonably request), all to the extent
required from time to time to enable such Holder to sell Registrable Securities
without registration under the Securities Act within the limitations of Rule 144
and Rule 144A under the Securities Act and customarily taken in connection with
sales pursuant to such exemptions. Upon the written request of any Holder of
Registrable Securities, the Issuers shall deliver to such Holder a written
statement as to whether it has complied with such filing requirements, unless
such a statement has been included in the Issuers' most recent report required
to be filed and filed pursuant to Section 13 or Section 15(d) of the Exchange
Act. Notwithstanding the foregoing, nothing in this Section 7 shall be deemed to
require the Issuers to register any of its securities under any section of the
Exchange Act.

                  SECTION 8. Miscellaneous

                  (a) No Conflicting Agreements. The Issuers are not, as of the
date hereof, a party to, nor shall it, on or after the date of this Agreement,
enter into, any agreement with respect to the Issuers' securities that conflicts
with the rights granted to the Holders of Registrable Securities in this
Agreement. The Issuers represent and warrant that the rights granted to the
Holders of Registrable Securities hereunder do not in any way conflict with the
rights granted to the holders of the Issuers' securities under any other
agreements.

                  (b) Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the Issuers have obtained the written consent of
Holders of a majority of the then outstanding Underlying Common Stock
constituting Registrable Securities (with Holders of Notes or Semi-annual Coupon
Notes deemed to be the Holders, for purposes of this Section, of the number of
outstanding shares of Underlying Common Stock into which such Notes or
Semi-annual Coupon Notes are or would be convertible or exchangeable as of the
date on which

                                       18
<PAGE>
such consent is requested). Notwithstanding the foregoing, a waiver or consent
to depart from the provisions hereof with respect to a matter that relates
exclusively to the rights of Holders of Registrable Securities whose securities
are being sold pursuant to a Registration Statement and that does not directly
or indirectly affect the rights of other Holders of Registrable Securities may
be given by Holders of at least a majority of the Registrable Securities being
sold by such Holders pursuant to such Registration Statement; provided that the
provisions of this sentence may not be amended, modified, or supplemented except
in accordance with the provisions of the immediately preceding sentence. Each
Holder of Registrable Securities outstanding at the time of any such amendment,
modification, supplement, waiver or consent or thereafter shall be bound by any
such amendment, modification, supplement, waiver or consent effected pursuant to
this Section 8(b), whether or not any notice, writing or marking indicating such
amendment, modification, supplement, waiver or consent appears on the
Registrable Securities or is delivered to such Holder.

                  (c) Notices. All notices and other communications provided for
or permitted hereunder shall be made in writing by hand delivery, by telecopier,
by courier guaranteeing overnight delivery or by first-class mail, return
receipt requested, and shall be deemed given (i) when made, if made by hand
delivery, (ii) upon confirmation, if made by telecopier, (iii) one (1) Business
Day after being deposited with such courier, if made by overnight courier, or
(iv) on the date indicated on the notice of receipt, if made by first-class
mail, to the parties as follows:

                  if to a Holder of Registrable Securities that is not a Notice
Holder, at the address for such Holder then appearing in the Registrar (as
defined in the Indenture);

                  if to a Notice Holder, at the most current address given by
such Holder to the Company in a Notice and Questionnaire or any amendment
thereto;

                  if to the Issuers, to:

                           Mesa Air Group, Inc.
                           410 North 44th Street, Suite 700
                           Phoenix, Arizona  85008
                           Telephone No. (602) 685-4000
                           Facsimile No. (602) 685-4352
                           Attention:  General Counsel

                  with a copy to:

                           Squire, Sanders & Dempsey L.L.P.
                           Two Renaissance Square
                           Suite 2700
                           40 North Central Avenue
                           Phoenix, Arizona  85004
                           Telephone No. (602) 528-4000
                           Facsimile No. (602) 253-8129
                           Attention:  Gregory R. Hall, Esq.

                                       19
<PAGE>
                  and

                  if to the Initial Purchasers, to:

                           Merrill Lynch & Co.,
                           4 World Financial Center, North Tower
                           New York, New York  10080
                           Attention:  Syndicate Department
                           Telecopier:  (212) 738-1069

                  with a copy to:

                           Cahill Gordon & Reindel llp
                           80 Pine Street
                           New York, New York  10005
                           Attention:  Stephen A. Greene, Esq.
                           Telecopier:  (212) 269-5420

or to such other address as such person may have furnished to the other persons
identified in this Section 8(c) in writing in accordance herewith.

                  (d) Approval of Holders. Whenever the consent or approval of
Holders of a specified percentage of Registrable Securities is required
hereunder, Registrable Securities held by the Issuers or their Affiliates (other
than the Initial Purchasers or subsequent Holders of Registrable Securities if
such subsequent Holders are deemed to be such affiliates solely by reason of
their holdings of such Registrable Securities) shall not be counted in
determining whether such consent or approval was given by the Holders of such
required percentage.

                  (e) Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the parties
hereto and, without requiring any express assignment, shall inure to the benefit
of and be binding upon each Holder of any Registrable Securities.

                  (f) Counterparts. This Agreement may be executed in any number
of counterparts and by the parties hereto in separate counterparts, each of
which when so executed shall be deemed to be original and all of which taken
together shall constitute one and the same agreement.

                  (g) Headings. The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  (h) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS OF LAWS PRINCIPLES THEREOF.

                  (i) Severability. If any term, provision, covenant or
restriction of this Agreement is held to be invalid, illegal, void or
unenforceable, the remainder of the terms,

                                       20
<PAGE>
provisions, covenants and restrictions set forth herein shall remain in full
force and effect and shall in no way be affected, impaired or invalidated
thereby, and the parties hereto shall use their best efforts to find and employ
an alternative means to achieve the same or substantially the same result as
that contemplated by such term, provision, covenant or restriction, it being
intended that all of the rights and privileges of the parties hereto shall be
enforceable to the fullest extent permitted by law.

                  (j) Entire Agreement. This Agreement is intended by the
parties hereto as a final expression of their agreement and is intended to be a
complete and exclusive statement of the agreement and understanding of the
parties hereto in respect of the subject matter contained herein and the
registration rights granted by the Issuers with respect to the Registrable
Securities. Except as provided in the Purchase Agreement, there are no
restrictions, promises, warranties or undertakings, other than those set forth
or referred to herein, with respect to the registration rights granted by the
Issuers with respect to the Registrable Securities. This Agreement supersedes
all prior agreements and undertakings among the parties hereto with respect to
such registration rights.

                  (k) Termination. This Agreement and the obligations of the
parties hereunder shall terminate upon the end of the Effectiveness Period,
except for any liabilities or obligations under Section 4, 5 or 6 hereof and the
obligations to make payments of and provide for liquidated damages under Section
2(e) hereof to the extent such damages accrue prior to the end of the
Effectiveness Period, each of which shall remain in effect in accordance with
its terms.

                                       21
<PAGE>
                  IN WITNESS WHEREOF, the parties have executed this
Registration Rights Agreement as of the date first written above.

                                        Very truly yours,

                                        MESA AIR GROUP, INC.

                                        By:  /s/ Jonathan Ornstein
                                             ----------------------------
                                             Name:  Jonathan Ornstein
                                             Title:

                                        MESA AIRLINES, INC.
                                        FREEDOM AIRLINES, INC.
                                        AIR MIDWEST, INC.
                                        MPD, INC.

                                        By:  /s/ Michael Lotz
                                             ----------------------------
                                             Name:  Michael Lotz
                                             Title:

                                        REGIONAL AIRCRAFT SERVICES, INC.
                                        MESA AIR GROUP-AIRCRAFT INVENTORY
                                           MANAGEMENT, LLC
                                        RITZ HOTEL MANAGEMENT CORP.

                                        By:  /s/ George Murnane III
                                             ----------------------------
                                             Name:  George Murnane III
                                             Title:
<PAGE>
Accepted as of the date
first above written:

MERRILL LYNCH, PIERCE, FENNER & SMITH
     INCORPORATED
RAYMOND JAMES & ASSOCIATES, INC.

By:  Merrill Lynch, Pierce, Fenner & Smith
       Incorporated

By:  /s/ David Iwan
     ----------------------------------------------
      Name: David Iwan
      Title:

For itself and the other several Initial Purchasers
named in Schedule A to the Purchase Agreement

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