Form of Indenture between the Registrant and Wachovia Bank



 Exhibit 4.7 
  
 INDENTURE 
  
 SPACEHAB, INCORPORATED 
  
 to 
  
 First
Union National Bank, Trustee 
  
 5.5% Senior Convertible Notes due
2010 
  
 Dated as of
            , 2005 







 CROSS-REFERENCE TABLE 
  
 TO TRUST INDENTURE ACT 
  

			
	 TIA

	 	 Indenture Section


	 310(a)(1) & (a)(2)
	 	6.09
	 (a)(3)
	 	6.15
	 (a)(4)
	 	N.A.
	 (a)(5)
	 	6.09; 6.10
	 (b)
	 	6.08; 6.09; 6.10; 6.11
	 (c)
	 	N.A.
	 311(a) & (b)
	 	6.13
	 (c)
	 	N.A.
	 312(a)
	 	7.01; 7.02(b)
	 (b)
	 	7.02(b)
	 (c)
	 	7.02(c)
	 313(a), (b)(1) & (b)(2)
	 	7.03
	 (c)
	 	1.06; 7.03(a)
	 (d)
	 	7.03(b)
	 314(a)
	 	7.04; 10.04
	 (b)
	 	N.A.
	 (c)(1) & (c)(2)
	 	1.02
	 (c)(3)
	 	N.A.
	 (d)
	 	N.A.
	 (e)
	 	1.02
	 (f)
	 	N.A.
	 315(a)
	 	6.01(1)
	 (b)
	 	1.06; 6.02
	 (c)
	 	6.01(b)
	 (d)
	 	6.01(c)
	 (e)
	 	5.14
	 316(a)(last sentence)
	 	1.01 (Definition of “Outstanding”)
	 (a)(1)(A)
	 	5.12
	 (a)(1)(B)
	 	5.13
	 (a)(2)
	 	N.A.
	 (b)
	 	5.08
	 (c)
	 	1.04
	 317(a)(1)
	 	5.03
	 (a)(2)
	 	5.04
	 (b)
	 	10.03
	 318(a) & (c)
	 	1.07

  
 N.A. means Not Applicable 

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

  

 ii 








 TABLE OF CONTENTS 
  


					
	 ARTICLE I Definitions and Other Provisions of General Application Definitions.
	 	1
			
	 SECTION 1.01.
	 	 Definitions
	 	1
	 SECTION 1.02.
	 	 Compliance Certificates and Opinions
	 	15
	 SECTION 1.03.
	 	 Form of Documents Delivered to Trustee
	 	16
	 SECTION 1.04.
	 	 Acts of Holders; Record Dates
	 	16
	 SECTION 1.05.
	 	 Notices, Etc., to Trustee and Company
	 	18
	 SECTION 1.06.
	 	 Notice to Holders; Waiver
	 	19
	 SECTION 1.07.
	 	 Conflict with Trust Indenture Act
	 	19
	 SECTION 1.08.
	 	 Effect of Headings and Table of Contents
	 	19
	 SECTION 1.09.
	 	 Successors and Assigns
	 	19
	 SECTION 1.10.
	 	 Severability Clause
	 	20
	 SECTION 1.11.
	 	 Benefits of Indenture
	 	20
	 SECTION 1.12.
	 	 Governing Law
	 	20
	 SECTION 1.13.
	 	 Legal Holidays
	 	20
		
	 ARTICLE II Security Forms
	 	20
			
	 SECTION 2.01.
	 	 Forms Generally
	 	20
	 SECTION 2.02.
	 	 Form of Face of Security
	 	21
	 SECTION 2.03.
	 	 Form of Reverse of Security
	 	24
	 SECTION 2.04.
	 	 Form of Trustee’s Certificate of Authentication
	 	32
	 SECTION 2.05.
	 	 Form of Conversion Notice
	 	33
		
	 ARTICLE III The Securities
	 	34
			
	 SECTION 3.01.
	 	 Title and Terms
	 	34
	 SECTION 3.02.
	 	 Denominations
	 	34
	 SECTION 3.03.
	 	 Execution, Authentication, Delivery and Dating
	 	34
	 SECTION 3.04.
	 	 Global and Non-Global Securities
	 	35
	 SECTION 3.05.
	 	 Registration; Registration of Transfer and Exchange
	 	37
	 SECTION 3.06.
	 	 Mutilated, Destroyed, Lost and Stolen Securities
	 	39
	 SECTION 3.07.
	 	 Payment of Interest; Interest Rights Preserved
	 	40
	 SECTION 3.08.
	 	 Persons Deemed Owners
	 	42
	 SECTION 3.09.
	 	 Cancellation
	 	42
	 SECTION 3.10.
	 	 Computation of Interest
	 	42
	 SECTION 3.11.
	 	 CUSIP Numbers
	 	42
		
	 ARTICLE IV Satisfaction and Discharge
	 	42
			
	 SECTION 4.01.
	 	 Satisfaction and Discharge of Indenture
	 	42
	 SECTION 4.02.
	 	 Application of Trust Money
	 	43
		
	 ARTICLE V Remedies
	 	44
			
	 SECTION 5.01.
	 	 Events of Default
	 	44
	 SECTION 5.02.
	 	 Acceleration of Maturity; Rescission and Annulment
	 	45
	 SECTION 5.03.
	 	 Collection of Indebtedness and Suits for Enforcement by Trustee
	 	46
	 SECTION 5.04.
	 	 Trustee May File Proofs of Claim
	 	47
	 SECTION 5.05.
	 	 Trustee May Enforce Claims Without Possession of Securities
	 	47

  

 i 









					
	 SECTION 5.06.
	 	 Application of Money Collected
	 	48
	 SECTION 5.07.
	 	 Limitation on Suits
	 	48
	 SECTION 5.08.
	 	 Unconditional Right of Holders to Receive Principal, Premium and Interest and to Convert
	 	49
	 SECTION 5.09.
	 	 Restoration of Rights and Remedies
	 	49
	 SECTION 5.10.
	 	 Rights and Remedies Cumulative
	 	49
	 SECTION 5.11.
	 	 Delay or Omission Not Waiver
	 	49
	 SECTION 5.12.
	 	 Control by Holders
	 	49
	 SECTION 5.13.
	 	 Waiver of Past Defaults
	 	50
	 SECTION 5.14.
	 	 Undertaking for Costs
	 	50
	 SECTION 5.15.
	 	 Waiver of Usury, Stay or Extension Laws
	 	50
		
	 ARTICLE VI The Trustee
	 	50
			
	 SECTION 6.01.
	 	 Certain Duties and Responsibilities
	 	50
	 SECTION 6.02.
	 	 Notice of Defaults
	 	51
	 SECTION 6.03.
	 	 Certain Rights of Trustee
	 	52
	 SECTION 6.04.
	 	 Not Responsible for Recitals or Issuance of Securities
	 	52
	 SECTION 6.05.
	 	 May Hold Securities
	 	53
	 SECTION 6.06.
	 	 Money Held in Trust
	 	53
	 SECTION 6.07.
	 	 Compensation and Reimbursement
	 	53
	 SECTION 6.08.
	 	 Disqualification: Conflicting Interests
	 	53
	 SECTION 6.09.
	 	 Corporate Trustee Required; Eligibility
	 	54
	 SECTION 6.10.
	 	 Resignation and Removal; Appointment of Successor
	 	54
	 SECTION 6.11.
	 	 Acceptance of Appointment by Successor
	 	55
	 SECTION 6.12.
	 	 Merger, Conversion, Consolidation or Succession to Business
	 	55
	 SECTION 6.13.
	 	 Preferential Collection of Claims Against Company
	 	56
	 SECTION 6.14.
	 	 Appointment of Authenticating Agent
	 	56
	 SECTION 6.15.
	 	 Appointment of Co-Trustee
	 	57
		
	 ARTICLE VII Holders’ Lists and Reports by Trustee and Company
	 	58
			
	 SECTION 7.01.
	 	 Company to Furnish Trustee Names and Addresses of Holders
	 	58
	 SECTION 7.02.
	 	 Preservation of Information; Communications to Holders.
	 	58
	 SECTION 7.03.
	 	 Reports by Trustee.
	 	58
	 SECTION 7.04.
	 	 Reports by Company.
	 	58
		
	 ARTICLE VIII Consolidation, Merger, Conveyance, Transfer or Lease
	 	59
			
	 SECTION 8.01.
	 	 Company May Consolidate, Etc., Only on Certain Terms
	 	59
	 SECTION 8.02.
	 	 Successor Substituted
	 	60
		
	 ARTICLE IX Supplemental Indentures
	 	60
			
	 SECTION 9.01.
	 	 Supplemental Indentures Without Consent of Holders
	 	60
	 SECTION 9.02.
	 	 Supplemental Indentures With Consent of Holders
	 	61
	 SECTION 9.03.
	 	 Execution of Supplemental Indentures and Amendments
	 	62
	 SECTION 9.04.
	 	 Effect of Supplemental Indentures and Amendments
	 	62
	 SECTION 9.05.
	 	 Conformity with Trust Indenture Act
	 	62
	 SECTION 9.06.
	 	 Reference in Securities to Supplemental Indentures
	 	62
	 SECTION 9.07.
	 	 Notice of Supplemental Indentures
	 	62

  

 ii 









					
	 ARTICLE X Covenants
	  	63
			
	 SECTION 10.01.
	  	 Payment of Principal, Premium and Interest
	  	63
	 SECTION 10.02.
	  	 Maintenance of Office or Agency
	  	63
	 SECTION 10.03.
	  	 Money for Security Payments to Be Held in Trust
	  	63
	 SECTION 10.04.
	  	 Statement by Officers as to Default
	  	64
	 SECTION 10.05.
	  	 Existence
	  	65
	 SECTION 10.06.
	  	 Maintenance of Properties
	  	65
	 SECTION 10.07.
	  	 Payment of Taxes and Other Claims
	  	65
	 SECTION 10.08.
	  	 Waiver of Certain Covenants
	  	65
	 SECTION 10.09.
	  	 Registration and Listing
	  	66
	 SECTION 10.10.
	  	 Delivery of Certain Information
	  	66
	 SECTION 10.11.
	  	 Limitation on Senior Secured and Acquisition Indebtedness
	  	66
	 SECTION 10.12.
	  	 Limitation on Dividends
	  	67
	 SECTION 10.13.
	  	 Limitation on Status as Investment Company
	  	67
		
	 ARTICLE XI Redemption of Securities
	  	68
			
	 SECTION 11.01.
	  	 Right of Redemption
	  	68
	 SECTION 11.02.
	  	 Applicability of Article
	  	68
	 SECTION 11.03.
	  	 Election to Redeem; Notice to Trustee
	  	68
	 SECTION 11.04.
	  	 Selection by Trustee of Securities to Be Redeemed
	  	68
	 SECTION 11.05.
	  	 Notice of Redemption
	  	68
	 SECTION 11.06.
	  	 Deposit of Redemption Price
	  	69
	 SECTION 11.07.
	  	 Securities Payable on Redemption Date
	  	69
	 SECTION 11.08.
	  	 Securities Redeemed in Part
	  	70
	 SECTION 11.09.
	  	 Conversion Arrangement on Call for Redemption
	  	70
		
	 ARTICLE XII [INTENTIONALLY OMITTED]
	  	71
		
	 ARTICLE XIII Conversion of Securities
	  	71
			
	 SECTION 13.01.
	  	 Conversion Privilege and Conversion Price
	  	71
	 SECTION 13.02.
	  	 Exercise of Conversion Privilege
	  	72
	 SECTION 13.03.
	  	 Fractions of Shares
	  	73
	 SECTION 13.04.
	  	 Adjustment of Conversion Price
	  	74
	 SECTION 13.05.
	  	 Notice of Adjustments of Conversion Price
	  	79
	 SECTION 13.06.
	  	 Notice of Certain Corporate Action
	  	79
	 SECTION 13.07.
	  	 Company to Reserve Common Stock
	  	80
	 SECTION 13.08.
	  	 Taxes on Conversions
	  	80
	 SECTION 13.09.
	  	 Covenant as to Common Stock
	  	80
	 SECTION 13.10.
	  	 Cancellation of Converted Securities
	  	81
	 SECTION 13.11.
	  	 Provisions in Case of Reclassification, Consolidation, Merger or Sale of Assets
	  	81
		
	 ARTICLE XIV Right to Require Repurchase
	  	81
			
	 SECTION 14.01.
	  	 Right to Require Repurchase
	  	81
	 SECTION 14.02.
	  	 Notice, Method of Exercising Repurchase Right
	  	82
	 SECTION 14.03.
	  	 Deposit of Repurchase Price
	  	83
	 SECTION 14.04.
	  	 Securities Not Repurchased on Repurchase Date
	  	83

  

 iii 









					
	 SECTION 14.05.
	  	 Securities Repurchased in Part
	  	83
	 SECTION 14.06.
	  	 Third Party Offer
	  	83
	 SECTION 14.07.
	  	 Certain Definitions
	  	83
		
	 ARTICLE XV Defeasance and Covenant Defeasance
	  	84
			
	 SECTION 15.01.
	  	 Company’s Option to Effect Defeasance or Covenant Defeasance
	  	84
	 SECTION 15.02.
	  	 Defeasance and Discharge
	  	84
	 SECTION 15.03.
	  	 Covenant Defeasance
	  	84
	 SECTION 15.04.
	  	 Conditions to Defeasance or Covenant Defeasance
	  	85
	 SECTION 15.05.
	  	 Deposited Money and U.S. Government Obligations to Be Held in Trust; Other Miscellaneous Provisions
	  	86
	 SECTION 15.06.
	  	 Reinstatement
	  	87
		
	 ARTICLE XVI Immunity
	  	87
			
	 SECTION 16.01.
	  	 Personal Immunity of Incorporators, Shareholders, Directors and Officers
	  	87

  

 iv 








 INDENTURE, dated as of
                , 2005, between SPACEHAB, INCORPORATED, a corporation duly organized and existing under the laws of the State of Washington (herein called the
“Company”), having its principal office at 12130 State Highway 3, Building 1, Webster, Texas 77598, and Wachovia Bank, National Association, as Trustee (herein called the “Trustee”). 
  
 RECITALS OF THE COMPANY 
  
 The Company has duly authorized the execution and delivery of this Indenture
to provide for the issuance of its 5.5% Senior Convertible Notes due 2010 (herein called the “Securities”), to be issued as in this Indenture provided. All things necessary to make the Securities, when executed by the Company and
authenticated and delivered hereunder and duly issued by the Company, the valid obligations of the Company, and to make this Indenture a valid agreement of the Company, 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 agreed, for the equal and proportionate benefit of all Holders of the Securities, as follows: 
  
 ARTICLE I 
  
 Definitions and Other Provisions of General Application Definitions. 
  
 SECTION 1.01. Definitions. For all purposes of this Indenture, except as otherwise expressly provided or unless the context otherwise requires:

  
 1. the terms defined in this Article have the
meanings assigned to them in this Article and include the plural as well as the singular; 
  
 2. all other terms used herein which are defined in the Trust Indenture Act, either directly or by reference therein, have the meanings
assigned to them therein; 
  
 3. all accounting
terms not otherwise defined herein have the meanings assigned to them in accordance with generally accepted accounting principles, and, except as otherwise herein expressly provided, the term “generally accepted accounting principles” with
respect to any computation required or permitted hereunder shall mean such accounting principles as are generally accepted at the date of such computation; 
  
 4. unless the context otherwise requires, any reference to an “Article” or a “Section” refers to an Article or
Section, as the case may be, of this Indenture; and 
  
 5. the words “herein”, “hereof” and “hereunder” and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section or other subdivision. 
  
 Certain terms used in Article XIV have the meanings specified therein.

  

 1 








 “Acquired Indebtedness” means Indebtedness of any Person existing at the time such Person
becomes a Subsidiary of the Company, including by designation, or is merged or Consolidated into or with the Company or one of its Subsidiaries. 
  
 “Acquisition” means the purchase or other acquisition of any Person (or any business for which then current audited financial statements are
available) or all or substantially all the assets of any Person by any other Person, whether by purchase, merger, consolidation, or other transfer, and whether or not for consideration. 
  
 “Act”, when used with respect to any Holder, has the meaning specified in Section 1.04. 
  
 “Affiliate” means any Person directly or indirectly controlling or
controlled by or under direct or indirect common control with the Company. For purposes of this definition, the term “control” means the power to direct the management and policies of a Person, directly or through one or more
intermediaries, whether through the ownership of voting securities, by contract, or otherwise. 
  
 “Agent Member” means any member of, or participant in, the Depositary. 
  
 “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 for such Security, in each case to the extent applicable to such transaction and as in effect from time to time. 
  
 “Authenticating Agent” means any Person authorized by the Trustee pursuant to Section 6.14 to act on behalf of the Trustee to authenticate
Securities. 
  
 “Average Life” means, as of the date of
determination, with respect to any security or instrument, the quotient obtained by dividing: (1) the product of: (A) the number of years (calculated to the nearest one-twelfth) from the date of determination to the date or dates of each successive
scheduled principal (or redemption) payment of such security or instrument multiplied by (B) the amount of each such respective principal (or redemption) payment divided by (2) the sum of all such principal (or redemption) payments. 
  
 “Board of Directors” means, with respect to any Person, the board
of directors (or if such Person is not a corporation, the equivalent board of managers or members or body performing similar functions for such Person) of such Person or any committee of the Board of Directors of such Person authorized, with respect
to any particular matter, to exercise the power of the board of directors of such Person. 
  
 “Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on
the date of such certification, and delivered to the Trustee. 
  
 “Business Day” means a day on which banking institutions are open for business and carrying out transactions in Dollars at the relevant place of payment. 
  

 2 








 “Capitalized Lease Obligation” means, as to any Person, the obligations of such Person under a
lease that are required to be classified and accounted for as capital lease obligations under GAAP and, for purposes of this definition, the amount of such obligations at any date shall be the capitalized amount of such obligations at such date,
determined in accordance with GAAP. 
  
 “Capital Stock”
means, with respect to any corporation, any and all shares, interests, rights to purchase (other than convertible or exchangeable Indebtedness that is not itself otherwise capital stock), warrants, options, participations or other equivalents of or
interests (however designated) in stock issued by that corporation. 
  
 “Cash Equivalent” means: (1) securities issued or directly and fully guaranteed or insured by the United States of America or any agency or instrumentality thereof (provided, that the full faith and credit of the United States of
America is pledged in support thereof) and securities issued by any state of the United States of America or any political subdivision thereof having the highest rating obtainable from either Moody’s Investors Service Inc. or Standard &
Poor’s Rating Services, (2) time deposits, certificates of deposit, bankers’ acceptances and commercial paper issued by the parent corporation of any domestic commercial bank of recognized standing having capital and surplus in excess of
$500 million, (3) commercial paper issued by others rated at least A-2 or the equivalent thereof by Standard & Poor’s Corporation or at least P-2 or the equivalent thereof by Moody’s Investors Service, Inc., (4) repurchase obligations
with a term of not more than seven days for underlying securities of the types described in (1) and (2) above entered into with any financial institution meeting the qualifications specified in (2) above, or (5) investment or money market funds,
substantially all of the assets of which constitute Cash Equivalents of the kinds described in (1) through (4) of this definition, and in the case of each of (1), (2), and (3), maturing within one year after the date of acquisition. 
  
 “Change of Control” will be deemed to have occurred at any time
following the issuance of the Securities that any of the following events occur: (a) any Person, or any Persons acting together in a manner which would constitute a “group” (a “Group”) for purposes of Section 13(d) of the
Exchange Act, or any successor provision thereto, together with any Affiliates thereof, (i) become the Beneficial Owners, directly or indirectly, of Capital Stock of the Company, which currently entitles such Person or Persons and its or their
Affiliates to exercise more than 50% of the total voting power of all classes of the Company’s Capital Stock entitled to vote generally in the election of directors of the Company or (ii) shall succeed in having sufficient of its or their
nominees (who are not supported by a majority of the then current Board of Directors of the Company) elected to the Board of Directors of the Company such that such nominees, when added to any existing directors remaining on the Board of Directors
of the Company after such election who are Affiliates of or acting in concert with any such Persons, shall constitute a majority of the Board of Directors of the Company, (b) the Company shall be a party to any transaction pursuant to which the
Common Stock is converted into the right to receive other securities (other than Common Stock), cash and/or property (or the Company, by dividend, tender or exchange offer or otherwise, distributes other securities, cash and/or property to holders
of Common Stock) and the value of all such securities, cash and/or property distributed in such transaction and any other transaction effected within the 12 months preceding consummation of such transaction (as determined in good faith by the Board
of Directors, whose 

  

 3 








 
determination shall be conclusive and described in a Board Resolution) is more than 50% of the average of the daily Closing Prices for the five consecutive
Trading Days ending on the Trading Day immediately preceding the date of such transaction (or, if earlier, the Trading Day immediately preceding the “ex” date (as defined in paragraph (7) of Section 13.04) for such transaction) or (c) the
Company shall consolidate with or merge into any other Person or sell, convey, transfer or lease all or substantially all of its properties and assets to any Person other than a Subsidiary, or any other Person shall consolidate with or merge into
the Company (other than, in the case of this clause (c), pursuant to any consolidation or merger where Persons who are shareholders of the Company immediately prior thereto become the Beneficial Owners of shares of Capital Stock of the surviving
company entitling such Persons to exercise more than 50% of the total voting power of all classes of such surviving company’s Capital Stock entitled to vote generally in the election of directors). Notwithstanding the foregoing, the conversion
or exchange of the Securities pursuant to the terms of the Indenture or otherwise into the Capital Stock of the Company by a Person or Group, together with any of its Affiliates, that would otherwise result in a Change of Control pursuant to the
preceding clause (a)(i) or (a)(ii) (to the extent such conversion or exchange also resulted in a Change of Control pursuant to clause (a)(i)) of this definition shall not be deemed a Change of Control hereunder until such Person or Group, together
with its Affiliates, acquiring such Beneficial Ownership acquires shares of Capital Stock of the Company which currently entitles such Person or Group, together with any Affiliates, to exercise an additional 1% of the total voting power of all
classes of the Company’s Capital Stock entitled to vote generally in the election of directors of the Company. 
  
 “Closing Price” on any Trading Day with respect to the per share price of Common Stock means the last reported sales price regular way or, in
case no such reported sale takes place on such Trading Day, the average of the reported closing bid and asked prices regular way, in either case on on the principal United States national securities exchange on which the Common Stock is listed or
admitted to trading, or, if not listed or admitted to trading on any national securities exchange, on The Nasdaq Stock Market, Inc. (“Nasdaq”) or, if the Common Stock is not listed or admitted to trading on any national securities exchange
or Nasdaq, the average of the closing bid and asked prices in the over-the-counter market as furnished by any New York Stock Exchange member firm that is selected from time to time by the Company for that purpose and is reasonably acceptable to the
Trustee. 
  
 “Commencement Date” has the meaning
specified in Section 13.04. 
  
 “Commission” means the
Securities and Exchange Commission, as from time to time constituted, created under the Exchange Act, or, if at any time after the execution of this instrument such Commission is not existing and performing the duties now assigned to it under the
Trust Indenture Act, then the body performing such duties at such time. 
  
 “Common Stock” includes any stock of any class of the Company which has no preference in respect of dividends or of amounts payable in the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which is not subject to redemption by the Company. However, subject to the provisions of Section 13.11, shares issuable on conversion of Securities shall include only shares of the class designated as Common Stock at the date of this instrument
or shares of any class or classes resulting from any reclassification or reclassifications thereof and which have no preference in respect of dividends 

  

 4 








 
or of amounts payable in the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Company and which are not subject to
redemption by the Company; provided that if at any time there shall be more than one such resulting class, the shares of each such class then so issuable shall be substantially in the proportion which the total number of shares of such class
resulting from all such reclassifications bears to the total number of shares of all such classes resulting from all such reclassifications. 
  
 “Company” means the Person named as the “Company” in the first paragraph of this instrument until a successor Person shall have become
such pursuant to the applicable provisions of this Indenture, and thereafter “Company” shall mean such successor Person. 
  
 “Company Request” or “Company Order” means a written request or order signed in the name of the Company by its Chairman of the Board,
its Vice Chairman of the Board, its President or a Vice President, and by its Treasurer, an Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered to the Trustee. 
  
 “Consolidation” means, with respect to the Company, the consolidation of the accounts of its Subsidiaries with
those of the Company, all in accordance with GAAP. The term “Consolidated” has a correlative meaning to the foregoing. 
  
 “Consolidated EBITDA” means, with respect to any Person, for any period, the Consolidated Net Income of such Person for such period adjusted to
add thereto (to the extent deducted from net revenues in determining Consolidated Net Income), without duplication, the sum of: (1) Consolidated income tax expense, (2) Consolidated depreciation and amortization expense, (3) Consolidated Interest
Expense, (4) debt extinguishment costs resulting from the redemption, repurchase, discharge or refinancing of Indebtedness of the Company, and (5) all other non-cash expenses (excluding any such non-cash expense to the extent that it represents an
accrual of or reserve for cash expenses in any future period or amortization of a prepaid cash expense that was paid in a prior period) of such Person and its Consolidated Subsidiaries for such period to the extent that such depreciation,
amortization and other non-cash expenses were deducted in computing Consolidated Net Income of such Person, less the amount of all cash payments made by such Person or any of its Subsidiaries during such period to the extent such payments relate to
non-cash charges that were added back pursuant to clauses (2) or (5) above in determining Consolidated EBITDA for such period or any prior period; provided, that Consolidated income tax expense, depreciation and amortization non-cash expenses of a
Subsidiary that is not a Wholly Owned Subsidiary shall only be added to the extent of the equity interest of the Company in such Subsidiary. For the purposes of this calculation, the Consolidated Interest Expense of such Person attributable to
interest on any Indebtedness or dividends on any Disqualified Capital Stock bearing a floating interest (or dividend) rate shall be computed on a pro forma basis as if the average rate in effect from the beginning of the Reference Period to the
Determination Date (as such term is defined in the definition of “Consolidated Net Leverage Ratio” below) had been the applicable rate for the entire period, unless such Person or any of its Subsidiaries is a party to an Interest Swap or
Hedging Obligation (which shall remain in effect for the 12-month period immediately following the Determination Date) that has the effect of fixing the interest rate on the date of computation, in which case such rate (whether higher or lower)
shall be used. 
  

 5 








 “Consolidated Interest Expense” of any Person means, for any period, the aggregate amount
(without duplication and determined in each case in accordance with GAAP) of: (A) interest expensed or capitalized, paid, accrued, or scheduled to be paid or accrued (including, in accordance with the following sentence, interest attributable to
Capitalized Lease Obligations) of such Person and its Consolidated Subsidiaries during such period, including: (1) amortization of original issue discount and non-cash interest payments or accruals on any Indebtedness (excluding amortization of debt
issuance costs), (2) the interest portion of all deferred payment obligations, and (3) all commissions, discounts and other fees and charges owed by such Person or its Consolidated Subsidiaries and not reimbursed by third parties with respect to
bankers’ acceptances and letters of credit financings and currency and Interest Swap and Hedging Obligations, in each case to the extent attributable to such period, and (B) the amount of dividends accrued or payable by such Person or any of
its Consolidated Subsidiaries (other than dividends paid in shares of Qualified Capital Stock) in respect of Preferred Stock (other than by Subsidiaries of the Company to the Company). For purposes of this definition: (1) interest on a Capitalized
Lease Obligation shall be deemed to accrue at an interest rate reasonably determined in good faith by the Company to be the rate of interest implicit in such Capitalized Lease Obligation in accordance with GAAP and (2) interest expense attributable
to any Indebtedness represented by the guaranty by such Person or a Subsidiary of such Person of an obligation of another Person shall be deemed to be the interest expense attributable to the Indebtedness guaranteed. 
  
 “Consolidated Net Income” means, with respect to any Person for any
period, the net income (or loss) of such Person and its Consolidated Subsidiaries (determined on a Consolidated basis in accordance with GAAP) for such period, adjusted to exclude (only to the extent included in computing such net income (or loss)
and without duplication): (A) all gains (but not losses) which are either extraordinary (as determined in accordance with GAAP) or are either unusual or nonrecurring (including any gain from the sale or other disposition of assets outside the
ordinary course of business or from the issuance or sale of any Capital Stock), together with any related provisions for taxes on any such extraordinary, unusual or non-recurring gain; provided that gains attributable to payments from mission
success insurance policies shall not be excluded to the extent of any offsetting loss incurred during such period resulting from the failure to which such policy payment relates, (B) the net income, if positive, of any Person, other than a
Consolidated Subsidiary, in which such Person or any of its Consolidated Subsidiaries has an interest except to the extent of the amount of any dividends or distributions actually paid in cash to such Person or a Consolidated Subsidiary of such
Person during such period, but in any case not in excess of such Person’s pro rata share of such Person’s net income for such period, (C) the net income, if positive, of any of such Person’s Consolidated Subsidiaries to the extent
that the declaration or payment of dividends or similar distributions is not at the time permitted by operation of the terms of its charter or bylaws or any other agreement, instrument, judgment, decree, order, statute, rule or governmental
regulation applicable to such Consolidated Subsidiary, (D) all dividends and distributions from any Subsidiary for such period that are a net reduction in Investments of such Person made in such Subsidiary, (E) the cumulative effect of any change in
accounting principles, and (F) the amortization of original issue discount on the Securities and the amortization of debt issuance costs, in each case to the extent such amount is not paid in cash. 
  

 6 








 “Consolidated Net Leverage Ratio” of any Person on any date of determination (the
“Determination Date”) means the ratio, on a pro forma basis after giving effect to the repayment, repurchase, redemption, defeasance or other acquisition, retirement or discharge of Indebtedness in connection with the transaction for which
such determination is being made, of (a) an amount equal to (1) the aggregate amount of Consolidated Indebtedness of such Person and its Subsidiaries on such Determination Date, minus (2) the aggregate amount of cash and Cash Equivalents of such
Person and its Subsidiaries on such Determination Date; to (b) the aggregate amount of the Consolidated EBITDA of the Company for the Reference Period attributable to continuing operations and businesses (exclusive of amounts attributable to
operations and businesses permanently discontinued or disposed of); provided, that for purposes of such calculation: (1) Acquisitions which occurred during the Reference Period or subsequent to the Reference Period and on or prior to the
Determination Date shall be assumed to have occurred on the first day of the Reference Period, (2) transactions giving rise to the need to calculate the Consolidated Net Leverage Ratio shall be assumed to have occurred on the first day of the
Reference Period, and (3) the incurrence of any Indebtedness (including issuance of any Disqualified Capital Stock) during the Reference Period or subsequent to the Reference Period and on or prior to the Determination Date (and the application of
the proceeds therefrom to the extent used to refinance or retire other Indebtedness) (other than Indebtedness incurred under any revolving credit facility) shall be assumed to have occurred on the first day of the Reference Period. 
  
 “Consolidated Net Worth” of any Person at any date means the
aggregate Consolidated stockholders’ equity of such Person (plus amounts of equity attributable to preferred stock) and its Consolidated Subsidiaries, as would be shown on the Consolidated balance sheet of such Person prepared in accordance
with GAAP, adjusted to exclude (to the extent included in calculating such equity), (a) the amount of any such stockholders’ equity attributable to Disqualified Capital Stock or treasury stock of such Person and its Consolidated Subsidiaries,
(b) all upward revaluations and other write-ups in the book value of any asset of such Person or a Consolidated Subsidiary of such Person subsequent to the Issue Date, and (c) all investments in Subsidiaries that are not Consolidated Subsidiaries
and in Persons that are not Subsidiaries. 
  
 “Consolidated
Subsidiary” means, for any Person, each Subsidiary of such Person (whether now existing or hereafter created or acquired) the financial statements of which are Consolidated for financial statement reporting purposes with the financial
statements of such Person in accordance with GAAP. 
  
 “Conversion Date” means, with respect to a conversion of Securities pursuant to a Mandatory Conversion, the date on which such conversion shall take place as specified in the written notice of conversion sent by the Company
pursuant to Section 13.02 and, with respect to all other conversions of Securities pursuant to Section 13.01, the date on which a Holder properly delivers its Securities and a duly signed and completed conversion notice pursuant to this Indenture.

  
 “Conversion Price” has the meaning specified in
Section 13.01. 
  

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 “Corporate Trust Office” means the principal office of the Trustee in the city at which at any
particular time its corporate trust business shall be administered. As of the date hereof, the Corporate Trust Office of the Trustee is located at 5847 San Felipe, Suite 1050, Houston, Texas 77057. 
  
 “Credit Agreement” means that certain Loan Agreement dated as of
February 11, 2005 by and between SPACEHAB, Incorporated and First American Bank, SSB, including any related notes, guarantees, collateral documents, instruments and agreements executed in connection therewith, as such credit agreement and/or related
documents may be amended, restated, supplemented, renewed, replaced or otherwise modified from time to time, whether or not with the same agent, trustee, representative lenders or holders, and, subject to the proviso to the next succeeding sentence,
irrespective of any changes in the terms and conditions thereof. Without limiting the generality of the foregoing, the term “Credit Agreement” shall include one or more agreements in respect of Interest Swap and Hedging Obligations and
letter of credit facilities with lenders (or Affiliates thereof) party to the Credit Agreement and shall also include any amendment, amendment and restatement, renewal, extension, restructuring, supplement or modification to any Credit Agreement and
all refundings, refinancings and replacements of any Credit Agreement, including any Credit Agreement: (1) extending the maturity of any Indebtedness incurred thereunder or contemplated thereby, (2) adding or deleting borrowers or guarantors
thereunder, so long as borrowers and guarantors include one or more of the Company and its Subsidiaries and their respective successors and assigns, (3) increasing the amount of Indebtedness incurred thereunder or available to be borrowed
thereunder; provided, that on the date such Indebtedness is incurred it would not be prohibited by Section 10.11 or (4) otherwise altering the terms and conditions thereof in a manner not prohibited by the terms of the Indenture. 
  
 “Defaulted Interest” has the meaning specified in Section 3.07.

  
 “Depositary” means, with respect to the Securities
issued in whole or in part in the form of one or more Global Securities, a clearing agency registered under the Exchange Act that is designated to act as Depositary for such Securities as contemplated by Section 2.01 (or any successor securities
clearing agency so registered) . 
  
 “Disqualified Capital
Stock” means with respect to any Person: (A) any Equity Interests of such Person that, by its terms or by the terms of any security into which it is convertible, exercisable or exchangeable, is, or upon the happening of an event or the passage
of time or both would be, required to be redeemed or repurchased, including at the option of the holder thereof, by such Person or any of its Subsidiaries, in whole or in part, on or prior to 91 days following the Stated Maturity of the Securities,
and (B) any Equity Interests of any Subsidiary of such Person other than any common equity with no preferences, privileges, and no redemption or repayment provisions. Notwithstanding the foregoing, any Equity Interests that would constitute
Disqualified Capital Stock solely because the holders thereof have the right to require the Company to repurchase such Equity Interests upon the occurrence of a Change of Control shall not constitute Disqualified Capital Stock if the terms of such
Equity Interests provide that the Company may not repurchase or redeem any such Equity Interests pursuant to such provisions prior to the purchase of the Securities as are required to be purchased pursuant to Section 14.01. Capital Stock subject to
repurchase obligations pursuant to the employee benefit plans of the Company and its Subsidiaries shall not be considered Disqualified Capital Stock. 
  

 8 








 “Distribution Date” has the meaning specified in Section 13.04. 
  
 “Dollar” or “U.S.$” means a Dollar or other equivalent
unit in such coin or currency of the United States as at the time shall be legal tender for the payment of public and private debts. 
  
 “DTC” means The Depository Trust Company, a New York corporation. 
  
 “Equity Interests” means Capital Stock or partnership, participation or membership interests and all warrants,
options or other rights to acquire Capital Stock or partnership, participation or membership interests (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock or partnership, participation or membership
interests). 
  
 “Event of Default” has the meaning
specified in Section 5.01. 
  
 “Exchange Act” means the
Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder. 
  
 “Existing Indebtedness” means the Indebtedness of the Company and its Subsidiaries (other than Indebtedness under the Credit Agreement) in
existence on the Issue Date, reduced to the extent such amounts are repaid, refinanced or retired. 
  
 “Expiration Date” has the meaning specified in Section 1.04. 
  
 “Expiration Time” has the meaning specified in Section 13.04. 
  
 “GAAP” means United States generally accepted accounting principles
set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by
such other entity as approved by a significant segment of the accounting profession in the United States as in effect from time to time. 
  
 “Global Security” means a Security that is registered in the Security Register in the name of a Depositary or a nominee thereof. 
  
 “Holder” means a Person in whose name a Security is registered in
the Security Register. 
  
 “Indebtedness” of any Person
means, without duplication, (A) all liabilities and obligations, contingent or otherwise, of such Person, to the extent such liabilities and obligations would appear as a liability upon the Consolidated balance sheet of such Person in accordance
with GAAP, (1) in respect of borrowed money (whether or not the recourse of the lender is to the whole of the assets of such Person or only to a portion thereof), (2) evidenced by bonds, notes, debentures or similar instruments, or (3) representing
the balance deferred and unpaid of the purchase price of any property or services, except those incurred in the ordinary course of its business that would ordinarily constitute a trade payable to trade creditors (other than accounts 

  

 9 








 
payable or other obligations to trade creditors which have remained unpaid for greater than 90 days past their original due date unless such accounts payable
or other obligations are being contested in good faith, in which case they will not constitute Indebtedness pending final resolution of such dispute); (B) all liabilities and obligations, contingent or otherwise, of such Person (1) evidenced by
bankers’ acceptances or similar instruments issued or accepted by banks, (2) relating to any Capitalized Lease Obligation, or (3) evidenced by a letter of credit or a reimbursement obligation of such Person with respect to any letter of credit;
(C) all net obligations of such Person under Interest Swap and Hedging Obligations; (D) all liabilities and obligations of others of the kind described in the preceding clause (A), (B) or (C) that such Person has guaranteed or provided credit
support or that are otherwise its legal liability or which are secured by any assets or property of such Person; (E) any and all deferrals, renewals, extensions, refinancings and refundings (whether direct or indirect) of, or amendments,
modifications or supplements to, any liability of the kind described in any of the preceding clauses (A), (B), (C) or (D), or this clause (E), whether or not between or among the same parties; and (F) all Disqualified Capital Stock of such Person
(measured at the greater of its voluntary or involuntary maximum fixed repurchase price plus accrued and unpaid dividends); provided, that any indebtedness which has been defeased in accordance with GAAP or defeased pursuant to the deposit of cash
or U.S. Government Obligations (in an amount sufficient to satisfy all such indebtedness obligations at maturity or redemption, as applicable, and all payments of interest and premium, if any) in a trust or account created or pledged for the sole
benefit of the holders of the indebtedness, and subject to no other Liens, and in accordance with the other applicable terms of the instrument governing such indebtedness, shall not constitute “Indebtedness.” For purposes hereof, the
“maximum fixed repurchase price” of any Disqualified Capital Stock which does not have a fixed repurchase price shall be calculated in accordance with the terms of such Disqualified Capital Stock as if such Disqualified Capital Stock were
purchased on any date on which Indebtedness shall be required to be determined pursuant to the Indenture, and if such price is based upon, or measured by, the fair market value of such Disqualified Capital Stock, such fair market value shall be
determined in good faith by the board of directors (or equivalent body or person) of the issuer of such Disqualified Capital Stock. The amount of any Indebtedness outstanding as of any date shall be (1) the accreted value thereof, in the case of any
Indebtedness issued with original issue discount, but the accretion of original issue discount in accordance with the original terms of Indebtedness issued with an original issue discount will not be deemed to be an incurrence and (2) the principal
amount thereof, together with any interest, premium or penalties thereon that are more than 30 days past due, in the case of any other Indebtedness. 
  
 “Indenture” means this instrument as originally executed or as it may from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof, including, for all purposes of this instrument and any such supplemental indenture, the provisions of the Trust Indenture Act that are deemed to be a part of and govern
this instrument and any such supplemental indenture, respectively. 
  
 “Interest Payment Date” means the Stated Maturity of an installment of interest on the Securities. 
  
 “Interest Swap and Hedging Obligation” means any obligation of any Person pursuant to any interest rate swap agreement, interest rate cap
agreement, interest rate collar 

  

 10 








 
agreement, interest rate exchange agreement, currency exchange agreement or any other agreement or arrangement designed to protect against fluctuations in
interest rates or currency values, including, without limitation, any arrangement whereby, directly or indirectly, such Person is entitled to receive from time to time periodic payments calculated by applying either a fixed or floating rate of
interest on a stated notional amount in exchange for periodic payments made by such Person calculated by applying a fixed or floating rate of interest on the same notional amount. 
  
 “Investment” by any Person in any other Person means (without duplication): (A) the acquisition (whether by
purchase, merger, consolidation or otherwise) by such Person (whether for cash, property, services, securities or otherwise) of Equity Interests, Capital Stock, bonds, notes, debentures or other securities, including any options or warrants, of such
other Person or any agreement to make any such acquisition; (B) the making by such Person of any deposit with, or advance, loan or other extension of credit to, such other Person (including the purchase of property from another Person subject to an
understanding or agreement, contingent or otherwise, to resell such property to such other Person) or any commitment to make any such advance, loan or extension (but excluding accounts receivable, endorsements for collection or deposits arising in
the ordinary course of business); (C) other than guarantees of the Company’s Indebtedness to the extent permitted by Section 10.11, the entering into by such Person of any guarantee of, or other credit support or contingent obligation with
respect to, Indebtedness or other liability of such other Person; and (D) the making of any capital contribution by such Person to such other Person. The Company will be deemed to make an Investment in an amount equal to the fair market value of the
net assets of any Person (or, if neither the Company nor any of its Subsidiaries has theretofore made an Investment in such Person, in an amount equal to the Investments being made), at the time that such Person is designated a Subsidiary, and any
property transferred to a Subsidiary from the Company or its other Subsidiaries shall be deemed an Investment valued at its fair market value at the time of such transfer. The Company or any of its Subsidiaries shall be deemed to have made an
Investment in a Person that is or was a Subsidiary if, upon the issuance, sale or other disposition of any portion of the Company’s or its Subsidiary’s ownership in the Capital Stock of such Person, such Person ceases to be a Subsidiary.
The fair market value of each Investment shall be measured at the time made or returned, as applicable. 
  
 “Issue Date” means the date of first issuance of the Securities under this Indenture. 
  
 “Mandatory Conversion” has the meaning specified in Section 13.01.

  
 “Maturity”, when used with respect to any Security,
means the date on which the principal of such Security or an installment of principal becomes due and payable as therein or herein provided, whether at the Stated Maturity or by declaration of acceleration, call for redemption, exercise of the
repurchase right or otherwise. 
  
 “Lien” means any
mortgage, charge, pledge, lien (statutory or otherwise), privilege, security interest, hypothecation or other encumbrance upon or with respect to any property of any kind, real or Personal, movable or immovable, now owned or hereafter acquired.

  
 “Notice of Default” means a written notice of the
kind specified in Section 5.01(4). 
  

 11 








 “Officers’ Certificate” means a certificate signed by any of the Chairman of the Board, a
Vice Chairman of the Board, the President or a Vice President, and by any of the Treasurer, an Assistant Treasurer, the Secretary or an Assistant Secretary, of the Company, and delivered to the Trustee. One of the officers signing an Officers’
Certificate given pursuant to Section 10.04 shall be the principal executive, financial or accounting officer of the Company. 
  
 “Opinion of Counsel” means a written opinion of counsel, who may be counsel for the Company. 
  
 “Outstanding”, when used with respect to Securities, means, as of
the date of determination, all Securities theretofore authenticated and delivered under this Indenture, except: (i) Securities theretofore cancelled by the Trustee or delivered to the Trustee for cancellation; (ii) Securities for whose payment or
redemption money in the necessary amount has been theretofore deposited with the Trustee or any Paying Agent (other than the Company) in trust or set aside and segregated in trust by the Company (if the Company shall act as its own Paying Agent) for
the Holders of such Securities; provided that, if such Securities are to be redeemed, notice of such redemption shall have been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee shall have been made; (iii)
Securities which have been paid pursuant to Section 3.06 or in exchange for or in lieu of which other Securities have been authenticated and delivered pursuant to this Indenture, other than any such Securities in respect of which there shall have
been presented to the Trustee proof satisfactory to it that such Securities are held by a bona fide purchaser in whose hands such Securities are valid obligations of the Company; and (iv) Securities which have been defeased pursuant to Section
15.02; provided, however, that in determining whether the Holders of the requisite principal amount of the Outstanding Securities have given, made or taken any request, demand, authorization, direction, notice, consent, waiver or other action
hereunder as of any date, Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or of 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, waiver or other action, only Securities which the Trustee knows to be so owned shall be so disregarded. Securities so owned which
have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not the Company or any other
obligor upon the Securities or any Affiliate of the Company or of such other obligor. 
  
 “Paying Agent” means any Person authorized by the Company to pay the principal of (and premium, if any) or interest on any Securities on behalf of the Company. 
  
 “Permitted Indebtedness” means (without duplication): (A)
Indebtedness incurred pursuant to the Credit Agreement in an aggregate principal amount at any time outstanding not to exceed $5 million; (B) other Existing Indebtedness of the Company; and (C) Refinancing Indebtedness with respect to any Existing
Indebtedness or Acquired Indebtedness or, with respect to the Company, any Indebtedness described in clause (A) or incurred pursuant to the Consolidated Net Leverage Ratio test set forth in Section 10.11(b) or which was refinanced pursuant to this
clause (C). 
  

 12 








 “Person” means any corporation, individual, limited liability company, joint stock company,
joint venture, partnership, limited liability partnership, unincorporated association, governmental regulatory entity, country, state or political subdivision thereof, trust, municipality or other entity. 
  
 “Predecessor Security” of any particular Security means every
previous Security evidencing all or a portion of the same debt as that evidenced by such particular Security; and, for the purposes of this definition, any Security authenticated and delivered under Section 3.06 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the same debt as the mutilated, destroyed, lost or stolen Security. 
  
 “Preferred Stock” means any Equity Interest of any class or classes of a Person (however designated) which is preferred as to payments of
dividends, or as to distributions upon any liquidation or dissolution, over Equity Interests of any other class of such Person. 
  
 “Pro Forma” or “pro forma” shall have the meaning set forth in Regulation S-X of the Securities Act, unless otherwise specifically
stated herein. 
  
 “Purchased Shares” has the meaning
specified in Section 13.04. 
  
 “Qualified Capital
Stock” means any Capital Stock of the Company that is not Disqualified Capital Stock. 
  
 “Redemption Date”, when used with respect to any Security to be redeemed, means the date fixed for such redemption by or pursuant to this Indenture. 
  
 “Redemption Price”, when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed as set forth in the Securities. 
  
 “Reference Date” has the meaning specified in Section 13.04. 
  
 “Reference Period” with regard to any Person means the four full fiscal quarters for which financial statements are available (or such lesser
period during which such Person has been in existence) ended immediately preceding any date upon which any determination is to be made pursuant to the terms of the Securities or the Indenture. 
  
 “Refinancing Indebtedness” means Indebtedness (including
Disqualified Capital Stock): (A) issued in exchange for, or the proceeds from the issuance and sale of which are used substantially concurrently to repay, redeem, defease, refund, refinance, replace, discharge or otherwise retire for value, in whole
or in part, or (B) constituting an amendment, modification or supplement to, or a deferral or renewal of ((A) and (B) above are, collectively, a “Refinancing”), any Indebtedness (including Disqualified Capital Stock) in a principal amount
or, in the case of Disqualified Capital Stock, liquidation preference, not to exceed (after deduction of reasonable and customary fees (including consent fees) and expenses incurred in connection with the Refinancing plus the amount of any premium
paid in connection with such Refinancing) the lesser of (1) the principal amount or, in the case of Disqualified Capital Stock, liquidation preference, of the Indebtedness (including Disqualified Capital Stock) so Refinanced and (2) if such
Indebtedness being Refinanced was issued with an original issue discount, the accreted 

  

 13 








 
value thereof (as determined in accordance with GAAP) at the time of such Refinancing; provided, that: (A) such Refinancing Indebtedness shall only be used
to refinance outstanding Indebtedness (including Disqualified Capital Stock) of such Person issuing such Refinancing Indebtedness, (B) such Refinancing Indebtedness shall (x) not have an Average Life shorter than the Indebtedness (including
Disqualified Capital Stock) to be so refinanced at the time of such Refinancing (or, if earlier, 91 days after the Stated Maturity of the Securities), and (y) in all respects, be no less contractually subordinated or junior, if applicable, to the
rights of holders of the Securities than was the Indebtedness (including Disqualified Capital Stock) to be refinanced, (C) such Refinancing Indebtedness shall have a final stated maturity or redemption date, as applicable, no earlier than the final
stated maturity or redemption date, as applicable, of the Indebtedness (including Disqualified Capital Stock) to be so refinanced or, if sooner, 91 days after the Stated Maturity of the Securities, and (D) such Refinancing Indebtedness shall be
secured (if secured) in a manner no more adverse to the holders of the Securities than the terms of the Liens (if any) securing such refinanced Indebtedness, including, without limitation, the amount of Indebtedness secured shall not be increased
(except to the extent of customary fees and expenses incurred in connection with the Refinancing plus the amount of any premium paid in connection with such Refinancing). 
  
 “Regular Record Date” for the interest payable on any Interest Payment Date means the April 1 or October 1
(whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. 
  
 “Repurchase Date” has the meaning specified in Section 14.01. 
  
 “Repurchase Price” has the meaning specified in Section 14.01. 
  
 “Responsible Officer”, when used with respect to the Trustee, means
the President or any Vice President, Assistant Vice President or Trust Officer of the Trustee to whom any matter has been referred because of such officer’s knowledge and familiarity with the particular subject. 
  
 “Securities” has the meaning stated in the first recital of this
Indenture and more particularly means any Securities authenticated and delivered under this Indenture and “Security” means one of such Securities. 
  
 “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations of the Commission thereunder. 
  
 “Security Register” and “Security Registrar” have the
respective meanings specified in Section 3.05. 
  
 “Senior
Secured Indebtedness” means Indebtedness of the Company that is secured by a Lien. 
  
 “Special Record Date” for the payment of any Defaulted Interest means a date fixed by the Trustee pursuant to Section 3.07. 
  

 14 








 “Stated Maturity,” when used with respect to any Security or any installment of principal
thereof or interest thereon, means the date specified in such Security as the fixed date on which the principal of such Security or such installment of principal or interest is due and payable. 
  
 “Subsidiary,” with respect to any Person, means: (1) a corporation
a majority of whose Equity Interests entitled to vote in the election of directors or members of the comparable governing body generally are at the time, directly or indirectly, owned by such Person, by such Person and one or more Subsidiaries of
such Person or by one or more Subsidiaries of such Person, and (2) any other Person (other than a corporation) in which such Person, one or more Subsidiaries of such Person, or such Person and one or more Subsidiaries of such Person, directly or
indirectly, at the date of determination thereof has a majority ownership interest, or (3) a partnership in which such Person or a Subsidiary of such Person is, at the time, a general partner and in which such Person, directly or indirectly, at the
date of determination thereof has a majority ownership interest. Unless the context requires otherwise, Subsidiary means each direct and indirect Subsidiary of the Company. 
  
 “Trading Day” means each Monday, Tuesday, Wednesday, Thursday and Friday, other than any day on which securities
are not traded on the applicable securities exchange or in the applicable securities market. 
  
 “Trust Indenture Act” means the Trust Indenture Act of 1939, as amended, and the rules and regulations (and, if applicable, no-action letters) of the Commission thereunder; provided, however, that in the
event the Trust Indenture Act of 1939 or such rules and regulations are amended after such date, “Trust Indenture Act” means, to the extent required by any such amendment, the Trust Indenture Act of 1939 and such rules and regulations as
so amended. 
  
 “Trustee” means the Person named as the
“Trustee” in the first paragraph of this instrument until a successor Trustee shall have become such pursuant to the applicable provisions of this Indenture, and thereafter “Trustee” shall mean such successor Trustee. 

 
 “United States” means the United States of America (including
the States thereof and the District of Columbia), its territories, its possessions and other areas subject to its jurisdiction. 
  
 “U.S. Government Obligations” has the meaning specified in Section 15.04. 
  
 “Vice President”, when used with respect to the Company or the Trustee, means any vice president, whether or not
designated by a number or a word or words added before or after the title “vice president”. 
  
 “Wholly Owned Subsidiary” means a Subsidiary all the Equity Interests of which (other than directors’ qualifying shares) are owned by the
Company or one or more Wholly Owned Subsidiaries of the Company or a combination thereof. 
  
 SECTION 1.02. Compliance Certificates and Opinions. Upon any application or request by the Company to the Trustee to take any action under any provision of 

  

 15 








 
this Indenture, the Company shall furnish to the Trustee an Officers’ Certificate, if to be given by an officer of the Company, or an Opinion of
Counsel, if to be given by counsel, stating that all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with. 
  
 Every certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture shall
include: 
  
 1. a statement that each individual
signing such certificate or opinion has read such covenant or condition and the definitions herein relating thereto; 
  
 2. a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in
such certificate or opinion are based; 
  
 3. a
statement that, in the opinion of each such individual, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with; and

  
 4. a statement as to whether, in the opinion
of each such individual, such condition or covenant has been complied with. 
  
 SECTION 1.03. Form of Documents Delivered to Trustee. In any case where several matters are required to be certified by, or covered by an opinion of, any specified Person, it is not necessary that all such matters be
certified by, or covered by the opinion of, only one such Person, or that they be so certified or covered by only one document, but one such Person may certify or give an opinion with respect to some matters and one or more other such Persons as to
other matters, and any such Person may certify or give an opinion as to such matters in one or several documents. 
  
 Any certificate or opinion of an officer of the Company may be based, insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations with respect to the matters upon which his certificate or opinion is based are erroneous.
Any such certificate or Opinion of Counsel may be based, insofar as it relates to factual matters, upon a certificate or opinion of, or representations by, an officer or officers of the Company stating that the information with respect to such
factual matters is in the possession of the Company, unless such counsel knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations with respect to such matters are erroneous. 
  
 Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other instruments under this Indenture, they may, but need not, be consolidated and form one instrument. 
  
 SECTION 1.04. Acts of Holders; Record Dates. Any request, demand, authorization, direction, notice, consent, waiver or other
action provided or permitted by this Indenture to be given or taken by Holders may be embodied in and evidenced by one or more 

  

 16 








 
instruments of substantially similar tenor signed by such Holders in person or by an agent duly appointed in writing; and, except as herein otherwise
expressly provided, such action shall become effective when such instrument or instruments are delivered to the Trustee and, where 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 the Holders signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent shall be sufficient for any purpose
of this Indenture and (subject to Section 6.01) conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section. 
  
 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 by a
certificate of a notary public or other officer authorized by law to take acknowledgments of deeds, certifying that the individual signing such instrument or writing acknowledged to him the execution thereof. Where such execution is by a signer
acting in a capacity other than his individual capacity, such certificate or affidavit shall also constitute sufficient proof of his authority. The fact and date of the execution of any such instrument or writing, or the authority of the Person
executing the same, may also be proved in any other manner which the Trustee deems sufficient. 
  
 The ownership of Securities shall be proved by the Security Register. 
  
 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 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. 
  
 The Company may set any day as a record date for the purpose of determining the Holders of Outstanding Securities entitled to give or take any request, demand, authorization, direction, notice, consent, waiver or other action provided or
permitted by this Indenture to be given or taken by Holders of Securities; provided that the Company may not set a record date for, and the provisions of this paragraph shall not apply with respect to, the giving or making of any notice,
declaration, request or direction referred to in the next paragraph. If any record date is set pursuant to this paragraph, the Holders of Outstanding Securities on such record date, and no other Holders, shall be entitled to take the relevant
action, whether or not such Holders remain Holders after such record date; provided that no such action shall be effective hereunder unless taken on or prior to the applicable Expiration Date by Holders of the requisite principal amount of
Outstanding Securities on such record date; and provided, further, that for the purpose of determining whether Holders of the requisite principal amount of such Securities have taken such action, no Security shall be deemed to have been Outstanding
on such record date unless it is also Outstanding on the date such action is to become effective. Nothing in this paragraph shall prevent the Company from setting a new record date for any action for which a record date has previously been set
pursuant to this paragraph (whereupon the record date previously set shall automatically and with no action by any Person be cancelled and of no effect), nor shall anything in this paragraph be construed to render ineffective any action taken by
Holders of the requisite principal amount of Outstanding Securities on the date such action is taken. Promptly after any record date is set pursuant to this paragraph, the Company, at its own expense, shall 

  

 17 








 
cause notice of such record date, the proposed action by Holders and the applicable Expiration Date to be given to the Trustee in writing and to each Holder
in the manner set forth in Section 1.06. 
  
 The Trustee may set
any day as a record date for the purpose of determining the Holders of Outstanding Securities entitled to join in the giving or making of (i) any Notice of Default, (ii) any declaration of acceleration referred to in Section 5.02, (iii) any request
to institute proceedings referred to in Section 5.07(2) or (iv) any direction referred to in Section 5.12. If any record date is set pursuant to this paragraph, the Holders of Outstanding Securities on such record date, and no other Holders, shall
be entitled to join in such notice, declaration, request or direction, whether or not such Holders remain Holders after such record date; provided that no such action shall be effective hereunder unless taken on or prior to the applicable Expiration
Date by Holders of the requisite principal amount of Outstanding Securities on such record date; and provided, further, that for the purpose of determining whether Holders of the requisite principal amount of such Securities have taken such action,
no Security shall be deemed to have been Outstanding on such record date unless it is also Outstanding on the date such action is to become effective. Nothing in this paragraph shall be construed to prevent the Trustee from setting a new record date
for any action (whereupon the record date previously set shall automatically and without any action by any Person be cancelled and of no effect), nor shall anything in this paragraph be construed to render ineffective any action taken by Holders of
the requisite principal amount of Outstanding Securities on the date such action is taken. Promptly after any record date is set pursuant to this paragraph, the Trustee, at the Company’s expense, shall cause notice of such record date, the
proposed action by Holders and the applicable Expiration Date to be given to the Company in writing and to each Holder in the manner set forth in Section 1.06. 
  

With respect to any record date set pursuant to this Section, the party hereto that sets such record date may designate any day as the “Expiration
Date” and from time to time may change the Expiration Date to any earlier or later day, provided that no such change shall be effective unless notice of the proposed new Expiration Date is given to the other party hereto in writing, and to each
Holder in the manner set forth in Section 1.06, on or before the existing Expiration Date. Notwithstanding the foregoing, no Expiration Date shall be later than the 180th day after the applicable record date and, if an Expiration Date is not
designated with respect to any record date set pursuant to this Section, the party hereto that set such record date shall be deemed to have designated the 180th day after such record date as the Expiration Date with respect thereto. 
  
 Without limiting the foregoing, a Holder entitled hereunder to take any
action hereunder with regard to any particular Security may do so with regard to all or any part of the principal amount of such Security or by one or more duly appointed agents, each of which may do so pursuant to such appointment with regard to
all or any part of such principal amount. 
  
 SECTION 1.05.
Notices, Etc., to Trustee and Company. Any request, demand, authorization, direction, notice, consent, waiver or Act of Holders or other document provided or permitted by this Indenture to be made upon, given or furnished to, or filed with,

  
 1. the Trustee by any Holder or by the
Company shall be sufficiently given if made, given, furnished or filed in writing to or with the Trustee at its Corporate Trust Office, Attention: Corporate Trust Department, or at any other address previously furnished in writing to the Company by
the Trustee, or 
  

 18 








 2. the Company by the Trustee or by any Holder shall be sufficiently given (unless
otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, to the Company, addressed to it at the address of its principal office specified in the first paragraph of this instrument or at any other address previously
furnished in writing to the Trustee by the Company. 
  
 SECTION
1.06. Notice to Holders; Waiver. Where this Indenture provides for notice to Holders of any event, such notice shall be sufficiently given (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, to each
Holder affected by such event, at his address as it appears in the Security Register, not later than the latest date (if any), and not earlier than the earliest date (if any), prescribed for the giving of such notice. In any case where notice to
Holders is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of such notice with respect to other Holders. Where this Indenture provides for notice
in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the
Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver. 
  
 In case by reason of the suspension of regular mail service or by reason of any other cause it shall be impracticable to give such notice by mail, then
such notification as shall be made with the approval of the Trustee shall constitute a sufficient notification for every purpose hereunder. 
  
 SECTION 1.07. Conflict with Trust Indenture Act. If any provision hereof limits, qualifies or conflicts with a provision of the Trust Indenture Act which
is required under the Trust Indenture Act to be a part of and govern this Indenture, the Trust Indenture Act provision shall control. If any provision of this Indenture modifies or excludes any provision of the Trust Indenture Act which may be so
modified or excluded, the Trust Indenture Act provision shall be deemed to apply to this Indenture as so modified or to be excluded, as the case may be. To the extent a Security conflicts with a provision in the Indenture, the Indenture governs.

  
 SECTION 1.08. Effect of Headings and Table of Contents. The
Article and Section headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof. 
  
 SECTION 1.09. Successors and Assigns. All covenants and agreements in this Indenture by the Company shall bind its successors and assigns, whether so
expressed or not. 
  

 19 








 SECTION 1.10. Severability 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 1.11. Benefits of Indenture. Nothing in this Indenture or in the Securities, express or implied, shall give to any Person, other than the
parties hereto and their successors hereunder and the Holders of Securities, any benefit or any legal or equitable right, remedy or claim under this Indenture. 
  

SECTION 1.12. Governing Law. THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK.

  
 SECTION 1.13. Legal Holidays. In any case where any Interest
Payment Date, Redemption Date, Repurchase Date or Stated Maturity of any Security or the last date on which a Holder has the right to convert his Securities shall not be a Business Day then (notwithstanding any other provision of this Indenture or
of the Securities) payment of interest or principal (and premium, if any) or conversion of the Securities need not be made on such date, but may be made on the next succeeding Business Day with the same force and effect as if made on the Interest
Payment Date, Redemption Date, Repurchase Date or at the Stated Maturity, or on such last day for conversion, provided that no interest shall accrue for the period from and after such Interest Payment Date, Redemption Date, Repurchase Date or Stated
Maturity, as the case may be. 
  
 ARTICLE II 
  
 Security Forms 
  
 SECTION 2.01. Forms Generally. The Securities, the conversion notice and the Trustee’s certificates of authentication
shall be in substantially the forms set forth in this Article, with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture, and may have such letters, numbers or other marks of
indemnification and such legends or endorsements placed thereon as may be required to comply with the rules of any securities exchange or Depositary therefor or as may, consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities. 
  
 The
definitive Securities shall be printed, lithographed or engraved on steel engraved borders or may be produced in any other manner, all as determined by the officers executing such Securities, as evidenced by their execution of such Securities.

  
 Upon their original issuance, the Securities shall be issued
in the form of a single Global Security in definitive, fully registered form without interest coupons, substantially in the form of Security set forth in Sections 2.02 and 2.03. Such Global Security shall be registered in the name of DTC, as
Depositary, or its nominee, duly executed by the Company and authenticated by the Trustee as hereinafter provided, and deposited with the Trustee, as custodian for DTC, for credit by DTC to the respective accounts of beneficial owners of the
Securities 

  

 20 








 
represented thereby (or such other accounts as they may direct). Such Global Security, together with its Successor Securities which are Global Securities,
are collectively herein called the “Global Security”. 
  
 Except as provided in this Section 2.01 or Section 3.05, owners of beneficial interests in Global Securities will not be entitled to receive physical delivery of certificated Securities. 
  
 Neither the Company nor the Trustee shall have any responsibility for any
defect in the CUSIP or ISIN number that appears on any Security, check, advice of payment or redemption or repurchase notice, and any such document may contain a statement to the effect that CUSIP or ISIN numbers have been assigned by an independent
service for convenience of reference and that neither the Company nor the Trustee shall be liable for any inaccuracy in such numbers. 
  
 SECTION 2.02. Form of Face of Security. 
  
 [FORM OF FACE] 
  
 [THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL SECURITY: 
  
 THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE
DEPOSITARY OR A NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE COMPANY, THE TRUSTEE AND ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES. 
  
 UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION
(“DTC”), TO THE COMPANY 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 DTC
(AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
  
 UNLESS AND UNTIL
IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM IN THE LIMITED CIRCUMSTANCES REFERRED TO IN THE INDENTURE, THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE
DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.] 
  

 21 








 SPACEHAB, Incorporated 
  
 5.5% Senior Convertible Notes due 2010 
  

			
	 No.             
	 	U.S.$            

  
 CUSIP
NO.                      
  
 SPACEHAB, Incorporated, a corporation duly organized and existing under the laws of the State of Washington (herein called the “Company”, which
term includes any successor Person under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to
                    , or registered assigns, the principal sum of
             United States Dollars (U.S.$            ) [if this Security is a Global Security, then insert
— (which principal amount may from time to time be increased or decreased to such other principal amounts (which, taken together with the principal amounts of all other Outstanding Securities, shall not exceed $63,250,000 by adjustments
made on the records of the Trustee hereinafter referred to in accordance with the Indenture)) on October 15, 2010, and to pay interest thereon, from
                , 2005, or from the most recent Interest Payment Date (as defined below) to which interest has been paid or duly provided for, semi-annually in
arrears on April 15 and October 15 in each year (each, an “Interest Payment Date”), commencing October 15, 2005, at the rate of 5.5% per annum, until the principal hereof is due, and at the rate of 5.5% per annum on any overdue principal
and premium, if any, and, to the extent permitted by law, on any overdue interest. 
  
 The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the April 1 or October 1 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Except as
otherwise provided in the Indenture, any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security (or one
or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities not less than 10 days prior
to the Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any automated quotation system or securities exchange on which the Securities may be quoted or listed, and upon such notice as
may be required by such exchange, all as more fully provided in the Indenture. 
  
 Payment of the principal of, premium, if any, and interest on this Security will be made at the Corporate Trust Office, in such coin or currency of the United States of America as at the time of payment is legal
tender for payment of public and private debts by a U.S. Dollar check drawn on an account maintained with a bank in the Borough of Manhattan, The City of New York or Houston, Texas; provided, however, that upon written application by the Holder to
the Security Registrar setting forth wire instructions not later than 15 days prior to the relevant payment date (in the case of payment of principal) or not later than the relevant Record Date (in the case of payment of interest), such Holder may
receive payment by wire transfer of Dollars to a U.S. Dollar account (such transfers to be made only to Holders of an aggregate principal amount in excess of U.S.$2,000,000) maintained by the payee with a bank in the United States or in Europe and
designated by the payee to the Security Registrar. 
  

 22 








 Reference is hereby made to the further provisions of this Security set forth on the reverse hereof,
which further provisions shall for all purposes have the same effect as if set forth at this place. 
  
 Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof or an Authenticating Agent by the
manual signature of one of their respective authorized signatories, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 
  

 23 








 IN WITNESS WHEREOF, the Company has caused this Security to be duly executed. 
  

			
	 SPACEHAB, Incorporated

		
	 By:
	 	  


	 Name:
	 	 
	 Title:
	 	 


  
 Attest: 
  

			
	 By:
	 	  


	 Name:
	 	 
	 Title:
	 	 
	
	 TRUSTEE’S CERTIFICATE OF AUTHENTICATION

	
	 This is one of the Securities referred to in the

	 within-mentioned Indenture.

	
	 Dated:

	
	 Wachovia Bank, National Association,

	 as Trustee

		
	 By:
	 	  


	 	 	Authorized Signatory

  
 SECTION 2.03. Form of
Reverse of Security. This Security is one of a duly authorized issue of securities of the Company designated as its “5.5% Convertible Senior Notes due 2010” (herein called the “Securities”), limited in aggregate principal amount
to U.S. $63,250,000, issued under an Indenture, dated as of                 , 2005 (herein called the “Indenture”), between the Company and Wachovia
Bank, National Association, as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. As provided in
Section 3.04 of the Indenture and subject to certain limitations therein set forth, Securities are exchangeable for a like aggregate principal amount of Securities of any authorized denominations as requested by the Holder surrendering the same upon
surrender of the Security or Securities to be exchanged, at the Corporate Trust Office of the Trustee. The Trustee upon such surrender by the Holder will issue the new Securities in the requested denominations. 
  

 24 








 In any case where the due date for the payment of the principal of, premium, if any, and interest, on any
Security or the last day on which a Holder of a Security has a right to convert his Security shall be, at any place of payment or place of conversion as the case may be, a day on which banking institutions at such place of payment or place of
conversion are authorized or obligated by law or executive order to close, then payment of principal, premium, if any, and interest, or delivery for conversion of such Security need not be made on or by such date at such place but may be made on or
by the next succeeding day at such place which is not a day on which banking institutions are authorized or obligated by law or executive order to close, with the same force and effect as if made on the date for such payment or by such last day for
conversion, and no interest shall accrue on the amount so payable for the period after such date. 
  
 No sinking fund is provided for the Securities. 
  
 Subject to and in compliance with the Indenture, the Securities will be redeemable at the option of the Company at any time, in whole or in part, upon not
less than 20 nor more than 40 days’ notice to the Holders prior to the Redemption Date at a Redemption Price payable in cash equal to 100% of the principal amount of the Securities being redeemed (the “Redemption Price”) together, in
each case, with accrued and unpaid interest, if any, to, but excluding, the Redemption Date and, if the Redemption Date is on or prior to                 , 2008,
an amount equal to the Make-Whole Premium; provided, however, that installments of interest, if any, on Securities whose Stated Maturity is on or prior to such Redemption Date will be payable to the Holders of such Securities, or one or more
Predecessor Securities, of record at the close of business on the relevant Record Dates, referred to on the face hereof all as provided in the Indenture. “Make-Whole Premium” with respect to a Security means an amount equal to the present
value of the remaining interest payments due on such Security to                 , 2008, computed using a discount rate equal to the Treasury Rate on such date
plus 1.00%. “Treasury Rate” for any date, means the yield to maturity at the time of computation of United States Treasury securities with a constant maturity (as compiled and published in the most recent Federal Reserve Statistical
Release H.15 (519) that has become publicly available at least two Business Days prior to the Redemption Date is effected pursuant to the event requiring such redemption (or, if such Statistical Release is no longer published, any publicly available
source of similar market data) most nearly equal to the period from the redemption date to                 , 2008; provided, however, that if the period from the
Redemption Date to                 , 2008 is not equal to the constant maturity of a United States Treasury security for which a weekly average yield is given,
the Treasury Rate shall be obtained by linear interpolation (calculated to the nearest one-twelfth of a year) from the weekly average yields of United States Treasury securities for which such yields are given except that if the period from the
Redemption Date to                 , 2008 is less than one year, the weekly average yield on actually traded United States Treasury securities adjusted to a
constant maturity of one year shall be used. 
  
 In the event of a
redemption of the Securities, the Company will not be required (a) to register the transfer or exchange of Securities for a period of 15 days immediately preceding the date notice is given identifying the serial numbers of the Securities called for
such redemption or (b) to register the transfer or exchange of any Security, or portion thereof, called for redemption. 
  

 25 








 Subject to and upon compliance with the provisions of the Indenture and by surrender of this Security,
duly endorsed or assigned to the Company or in blank, the Holder of this Security is entitled, at its option and at any time on or prior to the close of business on the second Business Day immediately preceding the Stated Maturity, Repurchase Date
or the Redemption Date for such Security, if any, to convert any Security that is an integral multiple of $1,000 principal amount into a number of fully paid and nonassessable shares of Common Stock at the Conversion Price in effect on the
Conversion Date (subject to the adjustments described below) as follows: 
  

				
	 Conversion Date

	  	 Conversion Price
 Per Share


	 Issue Date – April 14, 2006
	  	$	2.12
	 April 15, 2006 – October 14, 2006
	  	$	2.19
	 October 15, 2006 – April 14, 2007
	  	$	2.25
	 April 15, 2007 – October 14, 2007
	  	$	2.32
	 October 15, 2007 – April 14, 2008
	  	$	2.38
	 April 15, 2008 – October 14, 2008
	  	$	2.44
	 October 15, 2008 and thereafter
	  	$	2.50

  
 Subject to the
provisions of the Indenture, the principal amount of this Security shall automatically be converted (“Mandatory Conversion”) into shares of Common Stock at a Conversion Price of $2.50, subject to any adjustments pursuant to the Indenture,
if the Closing Price of the Common Stock has exceeded 130% of the Conversion Price of $2.50, as such price may be adjusted as described in the Indenture, for at least 20 consecutive Trading Days. Upon the occurrence of this event, the Company will
give the Trustee and the Holders written notice of the occurrence of a Mandatory Conversion and the Conversion Date for such Mandatory Conversion as soon as practicable, but no more than five days, following the date on which the conditions to the
Mandatory Conversion have been satisfied. The notice shall state the Conversion Date, which shall be not more than 40 and not less than 20 days after the date of mailing of such notice, on which date this Security shall be converted into shares of
Common Stock and shall state that the Holders may elect to convert their Securities at the Conversion Price then in effect at any time on or before the fifth Business Day prior to such Conversion Date. 
  
 In order to convert this Security at the option of the Holder, the Holder
shall deliver the conversion notice hereon duly executed and completed, to the Company at the Corporate Trust Office of the Trustee, or at such other office or agency of the Company, subject to any laws or regulations applicable thereto and subject
to the right of the Company to terminate the appointment of any Conversion Agent (as defined below) as may be designated by it for such purpose in the Borough of Manhattan, The City of New York or Houston, Texas, or at such other offices or agencies
as the Company may designate (each a “Conversion Agent”). In case such 

  

 26 








 
surrender due to conversion at the option of the Holder shall be made during the period 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, the conversion notice shall be accompanied by payment in New York Clearing House funds or other funds acceptable to the Company of an amount equal to the interest
payable on such Interest Payment Date on the principal amount of this Security then being converted. Notwithstanding the foregoing, (a) if this Security or portion hereof has been called for redemption on a Redemption Date or is repurchasable on a
Repurchase Date occurring, in either such case, during the period from the close of business on any Regular Record Date next preceding any Interest Payment Date to the opening of business on such succeeding Interest Payment Date, or if the Company
is in arrears on any previously due interest payment as of a Conversion Date for this Security or a portion hereof, and this Security is surrendered for redemption, repurchase or conversion during such period, then, in any such case, the Holder of
this Security on such Regular Record Date will be entitled to receive the amount of interest accruing hereon from the Interest Payment Date next preceding the date of such redemption, repurchase or conversion to such succeeding Interest Payment Date
and the Holder of this Security who converts this Security or a portion hereof during such period shall not be required to pay such amount upon surrender of this Security for redemption, repurchase or conversion, or (b) if this Security is converted
on a Conversion Date set for a Mandatory Conversion during the period from the close of business on any Regular Record Date next preceding any Interest Payment Date to the opening of business on such succeeding Interest Payment Date, then the Holder
of this Security on such Regular Record Date will be entitled to receive the amount of interest accruing hereon from the Interest Payment Date next preceding the Conversion Date of such Mandatory Conversion to such succeeding Interest Payment Date
and the Holder of this Security who converts this Security or a portion hereof during such period shall not be required to pay such amount upon surrender of this Security for Mandatory Conversion. 
  
 The Company will furnish to any Holder, upon request and without charge,
copies of the Certificate of Incorporation and By-laws of the Company then in effect. Any such request may be addressed to the Company or to the Security Registrar. 
  
 The Conversion Price is subject to adjustment as provided in the Indenture. 
  
 No adjustment in the Conversion Price will be made until such adjustment
would require an increase or decrease of at least one percent of such rate, provided that, any adjustment that would otherwise be made will be carried forward and taken into account in the computation of any subsequent adjustment. 
  
 If a Change of Control occurs, the Holder of this Security, at the
Holder’s option, shall have the right, in accordance with the provisions of the Indenture, to require the Company to repurchase this Security (or any portion of the principal amount hereof that is at least U.S.$1,000 or an integral multiple of
U.S.$1,000 in excess thereof, provided that the portion of the principal amount of this Security to be Outstanding after such repurchase is at least equal to U.S.$1,000) at a Repurchase Price equal to 100% of the principal amount thereof plus
accrued and unpaid interest, if any, to but excluding the Repurchase Date, subject to their right as described above if the Repurchase Date is during the period from the close of business on any Regular Record Date next preceding any Interest
Payment Date to the opening of business on 

  

 27 








 
such succeeding Interest Payment Date, to receive interest on such Interest Payment Date. At the Company’s option, the Repurchase Price may be paid in
shares of Common Stock or cash. If paid in Common Stock, the applicable Conversion Price shall equal the average of the Closing Price of the Common Stock for each of the 15 Trading Days immediately preceding the second Trading Day before the date of
the notice of the Change of Control. 
  
 Within 30 days following
a Change of Control, the Company shall give each Holder written notice of such Change of Control and of the repurchase right arising as a result of the Change of Control. If the Company elects to pay the Repurchase Price in shares of Common Stock,
then the Company shall notify the Holders of that election in the Change of Control notice. The Company’s offer to repurchase the Securities following a Change of Control will remain open for at least 20 Business Days and not more than 30
Business Days following the commencement of the Company’s offer. Upon expiration of this period, the Company will promptly purchase all Securities properly tendered in response to the Company’s offer. 
  
 Whenever in this Security there is a reference, in any context, to the
principal of any Security as of any time, such reference shall be deemed to include reference to the Repurchase Price payable in respect of such Security to the extent that such Repurchase Price is, was or would be so payable at such time, and
express mention of the Repurchase Price in any provision of this Security shall not be construed as excluding the Repurchase Price so payable in those provisions of this Security when such express mention is not made. 
  
 [The following paragraph shall appear in each Global Security:

  
 In the event of a deposit or withdrawal of an interest in
this Security, including an exchange, transfer, redemption, repurchase or conversion of this Security in part only, the Trustee, as custodian of the Depositary, shall make an adjustment on its records to reflect such deposit or withdrawal in
accordance with the Applicable Procedures.] 
  
 [The
following paragraph shall appear in each Security that is not a Global Security: 
  
 In the event of redemption, conversion or repurchase of this Security in part only, a new Security or Securities for the unredeemed, unconverted or unrepurchased portion hereof will be issued in the name of the Holder
hereof upon the cancellation hereof.] 
  
 Whether or not
required by the rules and regulations of the Commission, so long as there are any Outstanding Securities, the Company shall furnish the Holders (i) all quarterly and annual financial information that would be required to be contained in a filing
with the Commission on Forms 10-Q and 10-K (or any successor Forms) if the Company were required to file such Forms, including a “Management’s Discussion and Analysis of Financial Condition and Results of Operations” (or a successor
provision) that describes the Company’s Consolidated financial condition and results of operations and, with respect to the annual information only, a report thereon by the Company’s certified independent accountants; and (ii) all current
reports that would be required to be filed with the Commission on Form 8-K (or any successor Form) if the Company were required to file such reports, in each case within the time periods specified in the Commission’s rules and regulations.

  

 28 








 If an Event of Default shall occur and be continuing, the principal of all the Securities, together with
interest to the date of declaration, may be declared due and payable in the manner and with the effect provided in the Indenture. Upon payment (i) of the amount of principal so declared due and payable, together with interest to the date of
declaration, and (ii) interest on any overdue principal and, to the extent permitted by applicable law, on overdue interest, all of the Company’s obligations in respect of the payment of the principal of and interest on the Securities shall
terminate. 
  
 The Indenture permits, with certain exceptions as
therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities under the Indenture at any time by the Company and the Trustee with the consent of the Holders
of not less than a majority in aggregate principal amount of the Securities at the time Outstanding. The Indenture also contains provisions permitting the Holders of a majority in aggregate principal amount of the Securities at the time Outstanding,
on behalf of the Holders of all the Securities, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this
Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued in exchange therefore or in lieu hereof whether or not notation of such consent or waiver is made upon this Security or
such other Security. Certain modifications or amendments to the Indenture require the consent of the Holders of each Outstanding Security affected. 
  
 As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not have the right to institute any proceeding with
respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default, the Holders of not less than 25%
in principal amount of the Outstanding Securities shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity and the Trustee shall not have
received from the Holders of a majority in principal amount of the Securities Outstanding a direction inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer
of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Security for the enforcement of any payment of principal hereof, premium if any, or interest, hereon on or after the respective due dates expressed herein or
for the enforcement of the right to convert this Security as provided in the Indenture. 
  
 No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of, premium, if
any, and interest, on this Security at the times, places and rate, and in the coin or currency, herein prescribed or to convert this Security as provided in the Indenture. 
  
 As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is
registrable in the Security Register upon surrender of this Security for registration of transfer at the Corporate Trust Office of the Trustee or at such other office or agency of the Company as may be designated by it for such purpose in the
Borough of Manhattan, The City of New York (which shall initially be an office or agency of the Trustee), or 

  

 29 








 
at such other offices or agencies as the Company may designate, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to
the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities, of authorized denominations and for the same aggregate principal amount, will be issued
to the designated transferee or transferees by the Registrar. No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to recover any tax or other governmental charge
payable in connection therewith. 
  
 Prior to due presentment of
this 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 this Security is registered, as the owner hereof for all purposes, whether or not payment of or on
this Security is overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 
  
 Interest on this Security shall be computed on the basis of a 360-day year of twelve 30-day months. 
  
 All terms used in this Security which are defined in the Indenture shall have
the meanings assigned to them in the Indenture. 
  
 THE
INDENTURE AND THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 
  

 30 








 ABBREVIATIONS 
  
 The following abbreviations, when used in the inscription of the face of this Security, shall be construed as though they were written out in full
according to applicable laws or regulations: 
  

							
	TEN COM	  	as tenant in common	 	UNIF GIFT MIN ACT	 	             Custodian             
	TEN ENT	  	as tenants by the entireties (Cust)	 	 	 	(Cust)(Minor)
	JT TEN	  	 as joint tenants with right of
 survivorship and not
as tenants in common
	 	 	 	under Uniform Gifts to Minors Act             
	 	  	 	 	 	 	(State)

  
 Additional
abbreviations may also be used though not in the above list. 
  

 31 








 ELECTION OF HOLDER TO REQUIRE REPURCHASE 
  
 (1) Pursuant to Section 14.01 of the Indenture, the undersigned hereby elects to have this Security repurchased by the
Company. 
  
 (2) The undersigned hereby directs the Trustee or the
Company to pay it or                              [an amount in cash] [a number of shares of Common
Stock as determined in accordance with Section 14.01 of the Indenture] equal to 100% of the principal amount to be repurchased (as set forth below), plus accrued and unpaid interest to, but excluding, the Repurchase Date, as provided in the
Indenture. 
  
 Dated: 
  

	
	  


	  


	Signature(s)

  
 Signature(s) must be guaranteed by an
Eligible 
 Guarantor Institution with membership in an 
 approved
signature guarantee program pursuant 
 to Rule 17Ad-15 under the Securities Exchange 
 Act of 1934, as amended. 
  

	
	  


	Signature Guaranteed

  
 Principal amount to be repurchased (at
least 
 U.S. $1,000 or an integral multiple of U.S. $1,000 
 in
excess thereof):                      
  
 Remaining principal amount following such 
 repurchase (not less than U.S.
$1,000):                  
  
 NOTICE: The signature to the foregoing election must correspond to the name as written upon the face of this Security in every particular, without
alteration or any change whatsoever. 
  
 SECTION 2.04. Form of
Trustee’s Certificate of Authentication. This is one of the Securities referred to in the within-mentioned Indenture. 
  
 Dated: 
  

			
	 , as Trustee


		
	By:	 	  


	 	 	Authorized Signatory


  

 32 








 SECTION 2.05. Form of Conversion Notice. 
  
 CONVERSION NOTICE 
  
 To: SPACEHAB, Incorporated 
  
 The undersigned Holder of this Security hereby irrevocably exercises the option to convert this Security, or the portion hereof (which is U.S.$1,000 or an
integral multiple of U.S.$1,000 in excess thereof, provided that the unconverted portion of such principal amount is U.S.$1,000 or any integral multiple of U.S.$1,000 in excess thereof) below designated into shares of Common Stock in accordance with
the terms of the Indenture referred to in this Security, and directs that the shares issuable and deliverable upon conversion, together with any check in payment for a fractional share and any Security representing any unconverted principal amount
hereof, be issued and delivered to the registered owner hereof unless a different name has been provided below. If shares or any portion of this Security not converted are to be issued in the name of a Person other than the undersigned, the
undersigned will pay all transfer taxes payable with respect thereto and signature(s) must be guaranteed by an Eligible Guarantor Institution with membership in an approved signature guarantee program pursuant to Rule 17Ad-15 under the Securities
Exchange Act of 1934, as amended. Any amount required to be paid by the undersigned on account of interest accompanies this Security. 
  
 The Applicant hereby agrees that, promptly after request of the Company, he or it will furnish such proof in support of this certification as the Company
or the Security Registrar for the Common Stock may, from time to time, request. 
  
 Dated: 
  

					
	 	  	 	 	
 Signature*

			
	 If shares or Securities are to be
 registered in the name of a Person
 other than the Holder, please
 print such Person’s name and
 address:*
	  	 	 	 Principal amount to be converted (if less than all):
  
 $
            ,000

			
	  

	  	 	 	  


	Name	  	 	 	 Social Security or
 Taxpayer Identification Number

	  

	  	 	 	 
	Street Address	  	 	 	 
			
	  

	  	 	 	 
	City, State and Zip Code	  	 	 	 

  


	*	Signature(s) must be guaranteed by an eligible guarantor institution (banks, stock brokers, savings and loan associations and credit unions with membership in an approved signature


  

 33 








 
guarantee medallion program) pursuant to Securities and Exchange Commission Rule 17Ad-l5 if shares of Common Stock are to be delivered, or unconverted
Securities are to be issued, other than to and in the name of the registered owner. 
  
 ARTICLE III 
  
 The Securities

  
 SECTION 3.01. Title and Terms. The aggregate principal amount
of Securities which may be authenticated and delivered under this Indenture is limited to U.S.$63,250,000, except for Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities
pursuant to Sections 3.04, 3.05, 3.06, 9.06, 11.08, 13.02 or 14.05 and except for Securities which, pursuant to Section 3.03, are deemed never to have been authenticated and delivered hereunder. 
  
 The Stated Maturity of the Securities shall be October 15, 2010, and they
shall bear interest at the rate of 5.5% per annum, payable semi-annually on April 15 and October 15, commencing on Issue Date, until the principal thereof is paid or made available for payment. 
  
 Payment of the principal of, premium, if any, and interest on this Security
will be made at the Corporate Trust Office, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts by a U.S. Dollar check drawn on an account maintained with a bank
in the Borough of Manhattan, The City of New York or Houston, Texas; provided, however, that upon written application by the Holder to the Security Registrar setting forth wire instructions not later than 15 days prior to the relevant payment date
(in the case of payment of principal) or not later than the relevant Record Date (in the case of payment of interest), such Holder may receive payment by wire transfer of Dollars to a U.S. Dollar account (such transfers to be made only to Holders of
an aggregate principal amount in excess of U.S.$2,000,000) maintained by the payee with a bank in the United States or in Europe and designated by the payee to the Security Registrar. 
  
 The Securities shall be redeemable by the Company as provided in Article XI. 
  
 The Securities shall be convertible as provided in Article XIII. 

 
 The Securities shall be subject to purchase by the Company at the option
of the Holder as provided in Article XIV. 
  
 SECTION 3.02.
Denominations. The Securities shall be issuable only in registered form without coupons and only in denominations of U.S.$1,000 and any integral multiple thereof. 
  
 SECTION 3.03. Execution, Authentication, Delivery and Dating. The Securities shall be executed on behalf of the Company by
any of its Chairman of the Board, its Vice Chairman of the Board, its President or one of its Vice Presidents, under its corporate seal reproduced thereon and attested by its Secretary or one of its Assistant Secretaries. The signature of any of
these officers on the Securities may be manual or facsimile. 
  

 34 








 Securities bearing the manual or facsimile signatures of individuals who were the proper officers of the
Company at the time of execution shall bind the Company, notwithstanding that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Securities or did not hold such offices at the date of
such Securities. 
  
 At any time and from time to time after the
execution and delivery of this Indenture, the Company may deliver Securities executed by the Company to the Trustee for authentication, together with a Company Order for the authentication and delivery of such Securities; and the Trustee in
accordance with such Company Order shall authenticate and deliver such Securities as in this Indenture provided and not otherwise. 
  
 Each Security shall be dated the date of its authentication. 
  
 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 executed by the Trustee by manual signature, and such certificate upon any Security shall be conclusive evidence, and the only evidence, that such Security has been duly
authenticated and delivered hereunder. 
  
 SECTION 3.04. Global
and Non-Global Securities. 
  
 (a) Global
Securities. 
  
 (i) Each Global Security authenticated under this
Indenture shall be registered in the name of the Depositary designated by the Company for such Global Security or a nominee thereof and delivered to such Depositary or a nominee thereof or custodian therefor, and each such Global Security shall
constitute a single Security for all purposes, of this Indenture. 
  
 (ii) Notwithstanding any other provision in this Indenture, no Global Security may be exchanged in whole or in part for Securities registered, and no transfer of a Global Security in whole or in part may be registered, in the name of any
Person other than the Depositary for such Global Security or a nominee thereof unless (A) such Depositary (1) has notified the Company that it is unwilling or unable to continue as Depositary for such Global Security and a successor Depositary is
not appointed by the Company within 90 days after the date of such notice from the Depositary or (2) has ceased to be a clearing agency registered as such under the Exchange Act or announces an intention permanently to cease business or does in fact
do so, (B) there shall have occurred and be continuing an Event of Default with respect to such Global Security, or (C) the Company in its discretion at any time determines not to have all the Securities represented by a Global Security. Any Global
Security exchanged pursuant to clause (A) above shall be so exchanged in whole and not in part and any Global Security exchanged pursuant to clause (B) or (C) above 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. 
  
 (iii) If any Global Security
is to be exchanged for other Securities or canceled in whole, it shall be surrendered by or on behalf of the Depositary or its nominee to the Trustee, 

  

 35 








 
as Security Registrar, for exchange or cancellation as provided in this Article III. If any Global Security is to be exchanged for other Securities or
cancelled in part, or if another Security is to be exchanged in whole or in part for a beneficial interest in any Global Security, in each case, as provided in Section 3.05, then either (A) such Global Security shall be so surrendered for exchange
or cancellation as provided in this Article III or (B) the principal amount thereof shall be reduced or increased by an amount equal to the portion thereof to be so exchanged or cancelled, or equal to the principal amount of such other Security to
be so exchanged for a beneficial interest therein, as the case may be, by means of an appropriate adjustment made on the records of the Trustee, as Security Registrar, whereupon the Trustee, in accordance with the Applicable Procedures, shall
instruct the Depositary or its authorized representative to make a corresponding adjustment to its records. Upon any such surrender or adjustment of a Global Security, the Trustee shall, subject to Section 3.05(c) and as otherwise provided in this
Article III, authenticate and deliver any Securities issuable in exchange for such Global Security (or any portion thereof) to or upon the order of, and registered in such names as may be directed by, the Depositary or its authorized representative.
Upon the request of the Trustee in connection with the occurrence of any of the events specified in the preceding paragraph, the Company shall promptly make available to the Trustee a reasonable supply of Securities that are not in the form of
Global Securities. The Trustee shall be entitled to rely upon any order, direction or request of the Depositary or its authorized representative which is given or made pursuant to this Article III if such order, direction or request is given or made
in accordance with the Applicable Procedures. 
  
 (iv) Every
Security authenticated and delivered upon registration of transfer of, or in exchange for or in lieu of, a Global Security or any portion thereof, whether pursuant to this Article III or otherwise, shall be authenticated and delivered in the form
of, and shall be, a Global Security, unless such Security is registered in the name of a Person other than the Depositary for such Global Security or a nominee thereof, in which case such Security shall be authenticated and delivered in definitive,
fully registered form, without interest coupons. 
  
 (v) The
Depositary or its nominee, as registered owner of a Global Security, shall be the Holder of such Global Security for all purposes under the Indenture and the Securities, and owners of beneficial interests in a Global Security shall hold such
interests pursuant to the Applicable Procedures. Accordingly, any such owner’s beneficial interest in a Global Security will be shown only on, and the transfer of such interest shall be effected only through, records maintained by the
Depositary or its nominee or its Agent Members and such owners of beneficial interests in a Global Security will not be considered the owners or holders thereof. 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. 
  
 (b) Non-Global Securities. 
  
 (i) Securities issued upon the events described in Section 3.04(a)(ii) shall be in definitive, fully registered form,
without interest coupons. 
  
 (ii) Pending the preparation of
definitive Securities, the Company may execute, and upon Company Order the Trustee shall authenticate and deliver, temporary 

  

 36 








 
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 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 any
office or agency of the Company designated pursuant to Section 10.02, without charge to the Holder. Upon surrender for cancellation of any one or more temporary Securities the Company shall execute and the Trustee shall authenticate and deliver in
exchange therefor a like principal amount 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 3.05. Registration; Registration of Transfer and
Exchange. 
  
 (a) The Company shall cause to be
kept at the Corporate Trust Office of the Trustee a register (the register maintained in such office and in any other office or agency designated pursuant to Section 10.02 being herein sometimes collectively referred to as the “Security
Register”) in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Securities and of transfers and exchanges thereof. The Trustee is hereby appointed “Security Registrar”
for the purpose of registering Securities and transfers and exchanges thereof as herein provided. At the option of the Holder, and subject to the other provisions of this Section 3.05, Securities may be exchanged for other Securities of any
authorized denomination and of a like aggregate principal amount, upon surrender for registration of transfer or exchange of any Security at an office or agency of the Company designated pursuant to Section 10.02 for such purpose. Whenever any
Securities are so surrendered for exchange, and subject to the other provisions of this Section 3.05, the Company shall execute, and the Trustee shall authenticate and deliver, in the name of the designated transferee or transferees, one or more new
Securities, of any authorized denominations and of a like aggregate principal amount. Every Security presented or surrendered for registration of transfer or for exchange shall (if so required by the Company or the Security Registrar) be duly
endorsed, or be accompanied by a written instrument of transfer in form satisfactory to the Company, the Trustee and the Security Registrar duly executed, by the Holder thereof or his attorney duly authorized in writing. All Securities issued upon
any registration of transfer or exchange of Securities shall be the valid obligations of the Company, evidencing the same debt and entitled to the same benefits under this Indenture as the Securities surrendered upon such registration of transfer or
exchange. 
  
 (b) Notwithstanding any other
provisions of this Indenture or the Securities, transfers and exchanges of Securities and beneficial interests in a Global Security of the kinds specified in this Section 3.05(b) shall be made only in accordance with this Section 3.05(b).

  

 37 








 (i) Transfer of Global Security. Other than as set forth in Section 3.04(a), a Global Security may not be
transferred, in whole or in part, to any Person other than the Depositary or a nominee thereof, and no such transfer to any such other Person may be registered; provided that this Section 3.05(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 3.05(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 3.05(b). 
  
 (ii) Transfer of Beneficial Interests in the Global Security. Transfer of
beneficial interests in the Global Security shall be effected through the Depositary, in accordance with this Indenture and any Applicable Procedures. 
  
 (iii) Other Exchanges. In the event that a Global Security or any portion thereof is exchanged for Securities other than Global Securities, such other
Securities may in turn be exchanged (on transfer or otherwise) for Securities that are not Global Securities or for beneficial interests in a Global Security (if any is then outstanding) only in accordance with such procedures, which shall be
substantially consistent with the provisions of Section 3.05(b) as may be from time to time adopted by the Company and the Trustee, and any Applicable Procedures. 
  
 (iv) Transfer and Exchange of Definitive Securities. When definitive Securities are presented to the Security Registrar with
a request: 
  
 (A) to register the transfer of
such definitive Securities; or 
  
 (B) to
exchange such definitive Securities for an equal principal amount of definitive Securities of other authorized denominations, the Security Registrar shall register the transfer or make the exchange as requested if its reasonable requirements for
such transaction are met; provided, however, that the definitive Securities surrendered for transfer or exchange shall be duly endorsed or accompanied by a written instrument of transfer in form reasonably satisfactory to the Company and the
Security Registrar, duly executed by the Holder thereof or his attorney duly authorized in writing. 
  
 (v) Restrictions on Transfer of a Definitive Security for a Beneficial Interest in a Global Security. A definitive 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 definitive Security, duly endorsed or accompanied by appropriate instruments of transfer, in form satisfactory to
the Trustee, together with: written instructions directing the Trustee to make, or to direct the Securities 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 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 definitive Security and cause, or
direct the Securities Registrar to cause, in accordance with the standing instructions and procedures existing between the Depository and the Securities Registrar, the aggregate principal amount of Securities represented by the Global Security to be
increased by the aggregate principal amount of the definitive Security to be exchanged and shall 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 of the 

  

 38 








 
definitive Security so cancelled. If no Global Securities are then outstanding, the Company shall issue and the Trustee shall authenticate, upon written
order of the Company in the form of an Officers’ Certificate, a new Global Security in the appropriate principal amount. 
  
 (c) As used in the preceding two paragraphs of this Section 3.05, the term “transfer” encompasses any sale, pledge, transfer,
hypothecation or other disposition of any Security. 
  
 (d) No service charge shall be made for any registration of transfer or exchange of Securities, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any
registration of transfer or exchange of Securities, other than exchanges pursuant to Section 3.04, 9.06, 11.08, 13.02 or 14.05 not involving any transfer. 
  
 (e) The Company shall not be required (i) to issue, register the transfer of or exchange any Security during a period beginning at the
opening of business 15 days before the day of the mailing of a notice of redemption of Securities selected for redemption under Section 11.04 and ending at the close of business on the day of such mailing, or (ii) to register the transfer of or
exchange any Security so selected for redemption in whole or in part, except the unredeemed portion of any Security being redeemed in part. 
  
 SECTION 3.06. Mutilated, Destroyed, Lost and Stolen Securities. If any mutilated Security is surrendered to the Trustee, the Company shall execute and the
Trustee shall authenticate and deliver in exchange therefor a new Security of like tenor and principal amount and bearing a number not contemporaneously outstanding. 
  
 If there shall be delivered to the Company and the Trustee (i) evidence to their satisfaction of the destruction, loss or
theft of any Security and (ii) such security or indemnity as may be required by them to save each of them and any agent of either of them harmless, then, in the absence of notice to the Company or the Trustee that such Security has been acquired by
a bona fide purchaser, the Company shall execute and the Trustee shall authenticate and deliver, in lieu of any such destroyed, lost or stolen Security, a new Security of like tenor and principal amount and 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, the Company in its discretion, but subject to any conversion rights, may, instead of issuing a new Security, pay such Security. 
  
 Upon the issuance, authentication and delivery by the Trustee of any new
Security 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, authenticated and
delivered by the Trustee 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 the benefits of this Indenture equally and proportionately with any and all other Securities duly issued hereunder. 
  

 39 








 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 3.07. Payment of Interest; Interest Rights Preserved. Interest on any Security which 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 (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for payment of such interest. 
  
 If the Company shall be required by law to deduct any taxes from any sum of
interest payable hereunder to a Holder, (i) the Company shall make such deductions and shall pay the full amount deducted to the relevant taxing authority in accordance with applicable law and (ii) the amount of such deduction shall be treated for
purposes hereof as a payment of interest. 
  
 Any interest on any
Security which is payable, but is not punctually paid or duly provided for, on any Interest Payment Date (herein called “Defaulted Interest”) shall forthwith cease to be payable to the Holder on the relevant Regular Record Date 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 (or their respective
Predecessor 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, 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 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 (1) provided. Thereupon, the Trustee shall fix a 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 at his address as it appears in the Security Register, 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 so mailed, such Defaulted Interest shall be paid to the Persons in whose names the Securities (or their respective Predecessor 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). 
  

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 2. The Company may make payment of any Defaulted Interest in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the 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 proposed payment pursuant to
this Clause (2), such manner of payment shall be deemed practicable by the Trustee. 
  
 Subject to the foregoing provisions of this Section, 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 interest
accrued and unpaid, and to accrue, which were carried by such other Security. 
  
 In the case of any Security which is converted after any Regular Record Date and on or prior to the corresponding Interest Payment Date, interest on such Security whose Stated Maturity is on such Interest Payment Date
shall be deemed to continue to accrue and shall be payable on such Interest Payment Date notwithstanding such conversion and notwithstanding that such Security may have been called for redemption on a Redemption Date within such period, and such
interest (whether or not punctually paid or duly provided for) shall be paid to the Person in whose name that Security (or one or more Predecessor Securities) is registered at the close of business on such Regular Record Date. Except as otherwise
expressly provided in the immediately preceding sentence or below, in the case of any Security which is converted, interest whose Stated Maturity is after the date of conversion of such Security shall not be payable (although such accrued and unpaid
interest will be deemed paid by the appropriate portion of the Common Stock received by the holders upon such conversion). Notwithstanding anything to the contrary herein, (a) if a Security or portion thereof has been called for redemption on a
Redemption Date or is repurchasable on a Repurchase Date occurring, in either such case, during the period from the close of business on any Regular Record Date next preceding any Interest Payment Date to the opening of business on such succeeding
Interest Payment Date, or if the Company is in arrears on any previously due interest payment as of a Conversion Date for a Security or a portion thereof, and such Security is surrendered for redemption, repurchase or conversion during such period,
then, in any such case, the Holder of such Security on such Regular Record Date will be entitled to receive the amount of interest accruing thereon from the Interest Payment Date next preceding the date of such redemption, repurchase or conversion
to such succeeding Interest Payment Date and the Holder of such Security who converts such Security or a portion thereof during such period shall not be required to pay such amount upon surrender of such Security for redemption, repurchase or
conversion, or (b) if a Security is converted on a Conversion Date set for a Mandatory Conversion during the period from the close of business on any Regular Record Date next preceding any Interest Payment Date to the opening of business on such
succeeding Interest Payment Date, then the Holder of such Security on such Regular Record Date will be entitled to receive the amount of interest accruing thereon from the Interest Payment Date next preceding the Conversion Date of such Mandatory
Conversion to such succeeding Interest Payment Date and the Holder of such Security who converts such Security or a portion thereof during such period shall not be required to pay such amount upon surrender of such Security for Mandatory Conversion.

  

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 SECTION 3.08. 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, premium, if any, and (subject to
Section 3.07) interest on such Security 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 3.09. Cancellation. All Securities surrendered for
payment, redemption, repurchase, registration of transfer or exchange or conversion 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 may have acquired in any manner whatsoever, and all Securities so delivered shall be promptly cancelled by the Trustee. 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 as directed by a Company
Order. 
  
 SECTION 3.10. Computation of Interest. Interest on the
Securities shall be computed on the basis of a 360-day year of twelve 30-day months. 
  
 SECTION 3.11. CUSIP Numbers. The Company in issuing Securities may use “CUSIP” numbers (if then generally in use) in addition to serial numbers; if so, the Trustee shall use such CUSIP numbers in addition to
serial numbers in any notice of redemption or repurchase as a convenience to Holders; provided that any such notice may state that no representation is made as to the correctness of such CUSIP numbers either as printed on the Securities or as
contained in any notice of a redemption or repurchase and that reliance may be placed only on the serial or other identification numbers printed on the Securities, and any such redemption or repurchase shall not be affected by any defect in or
omission of such CUSIP numbers. 
  
 ARTICLE IV 
  
 Satisfaction and Discharge 
  
 SECTION 4.01. Satisfaction and Discharge of Indenture. This Indenture shall
upon Company Request cease to be of further effect (except as to any surviving rights of conversion, registration of transfer or exchange of Securities herein expressly provided for), and the Trustee, at the expense of the Company, shall execute
proper instruments acknowledging satisfaction and discharge of this Indenture, when 
  
 1. either 
  
 (A) all Securities theretofore authenticated and delivered (other than (i) Securities which have been destroyed, lost or stolen and which
have been replaced or paid as provided in Section 3.06 and (ii) Securities for whose payment money has theretofore been deposited in trust or segregated and held in trust by the Company and thereafter repaid to the Company or discharged from such
trust, as provided in Section 10.03) have been delivered to the Trustee for cancellation; or 
  

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 (B) all such Securities not theretofore delivered to the Trustee for cancellation (i)
have become due and payable, or (ii) will become due and payable at their Stated Maturity within one year, or (iii) are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption
by the Trustee in the name, and at the expense, of the Company, and the Company, in the case of (i), (ii) or (iii) above, has given notice of the same to all Holders and deposited or caused to be deposited irrevocably with the Trustee as trust funds
in trust for the benefit of Holders of Outstanding Securities in an amount sufficient to pay and discharge the entire indebtedness on such Securities not theretofore delivered to the Trustee for cancellation, for principal (and premium, if any) and
interest to the date of such deposit (in the case of Securities which have become due and payable) or to the Stated Maturity or Redemption Date, as the case may be, together with irrevocable instructions from the Company to the Trustee to apply such
funds to the payment thereof at the stated Maturity or Redemption Date, as the case may be; 
  
 2. the Company has paid or caused to be paid all other sums payable hereunder by the Company; 
  
 3. the Company has delivered to the Trustee an
Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent herein provided for relating to the satisfaction and discharge of this Indenture have been complied with; 
  
 4. no Event of Default which, with notice or lapse of time,
or both, would become an Event of Default with respect to the Securities shall have occurred and be continuing on the date of such deposit (other than an Event of Default resulting from the incurrence of Indebtedness the net proceeds of which are
used to make such deposit); 
  
 5. such deposit
shall not result in a breach or violation of, or constitute a default under, any material agreement or instrument (other than the Indenture) to which the Company is a party or by which the Company is bound. 
  
 Notwithstanding the satisfaction and discharge of this Indenture, the obligations of the
Company to the Trustee under Section 6.07, the obligations of the Trustee to any Authenticating Agent under Section 6.14 and, if money shall have been deposited with the Trustee pursuant to subclause (B) of clause (1) of this Section, the
obligations of the Trustee under Section 4.02 and the last paragraph of Section 10.03 shall survive. 
  
 SECTION 4.02. Application of Trust Money. Subject to the provisions of the last paragraph of Section 10.03, all money deposited with the Trustee pursuant
to Section 4.01 shall be held in trust and applied by it, in accordance with the provisions of the Securities and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent) as
the Trustee may determine, to the Persons entitled thereto, of the principal (and premium, if any) and interest for whose payment such money has 

  

 43 








 
been deposited with the Trustee. All moneys deposited with the Trustee pursuant to Section 4.01 (and held by it or any Paying Agent) for the payment of
Securities subsequently converted shall be returned to the Company upon Company Request. 
  
 ARTICLE V 
  
 Remedies 

 
 SECTION 5.01. Events of Default. “Event of Default”, wherever
used herein, means any one of the following events (whatever the reason for such Event of Default and whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any
order, rule or regulation of any administrative or governmental body): 
  
 1. default in the payment of any interest upon any Security when it becomes due and payable, and continuance of such default for a period of 30 days; or 
  
 2. default in the payment of the principal of (or premium, if any, on) any Security at its Maturity
(including any Redemption Price or Repurchase Price); or 
  
 3. failure by the Company to provide the notice of a Change of Control in accordance with Section 14.02, default in the payment of the Repurchase Price in respect of any Note on the Repurchase Date therefor; or

  
 4. default in the performance, or breach, of
any covenant or warranty of the Company in this Indenture (other than a covenant or warranty a default in whose performance or whose breach is elsewhere in this Section specifically dealt with), and continuance of such default or breach for a period
of 60 days after there has been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Outstanding Securities a written notice specifying such
default or breach and requiring it to be remedied and stating that such notice is a “Notice of Default” hereunder; or 
  
 5. a default under any bonds, debentures, notes or other evidences of Indebtedness by the Company or a Subsidiary or under any mortgages,
indentures or instruments under which there may be issued or by which there may be secured or evidenced any Indebtedness by the Company or a Subsidiary, whether such Indebtedness now exists or shall hereafter be created, which Indebtedness,
individually or in the aggregate, has a principal amount outstanding in excess of U.S.$3,000,000, which default shall constitute a failure to pay any portion of the principal or interest of such Indebtedness when due and payable after the expiration
of any applicable grace or cure period with respect thereto or shall have resulted in such Indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable; or 
  
 6. the entry of final nonappealable unsatisfied judgments
not covered by insurance aggregating in excess of U.S.$3,000,000, at any one time rendered against the Company or any of its Subsidiaries (or a combination thereof) and not stayed, bonded or discharged within 60 days; or 
  

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 7. the entry by a court having jurisdiction in the premises of (A) a decree or order for
relief in respect of the Company or a Subsidiary in an involuntary case or proceeding under any applicable Federal or State bankruptcy, insolvency, reorganization or other similar law or (B) a decree or order adjudging the Company or a Subsidiary
bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company or a Subsidiary under any applicable Federal or State law, or appointing a custodian,
receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Company or a Subsidiary or of any substantial part of their respective properties, or ordering the winding up or liquidation of the affairs of the Company or a
Subsidiary, and the continuance of any such decree or order for relief or any such other decree or order unstayed and in effect for a period of 60 consecutive days; or 
  
 8. the commencement by the Company or a Subsidiary of a voluntary case or proceeding under any applicable
Federal or State bankruptcy, insolvency, reorganization or other similar law or of any other case or proceeding to be adjudicated a bankrupt or insolvent, or the consent by either the Company or a Subsidiary to the entry of a decree or order for
relief in respect of the Company or a Subsidiary in an involuntary case or proceeding under any applicable Federal or State bankruptcy, insolvency, reorganization or other similar law or to the commencement of any bankruptcy or insolvency case or
proceeding against either the Company or a Subsidiary, or the filing by either the Company or a Subsidiary of a petition or answer or consent seeking reorganization or relief under any applicable Federal or State law, or the consent by either the
Company or a Subsidiary to the filing of such petition or to the appointment of or taking possession by a custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Company or a Subsidiary or of any substantial
part of their respective properties, or the making by either the Company or a Subsidiary of an assignment for the benefit of creditors, or the admission by either the Company or a Subsidiary in writing of an inability to pay the debts of either the
Company or a Subsidiary generally as they become due, or the taking of corporate action by the Company or a Subsidiary in furtherance of any such action. 
  
 SECTION 5.02. Acceleration of Maturity; Rescission and Annulment. If an Event of Default (other than an Event of Default specified in Section 5.01(7) or
5.01(8)) occurs and is continuing, then in every such case the Trustee or the Holders of not less than 25% in principal amount of the Outstanding Securities may declare the principal of all the Securities to be due and payable immediately, by a
notice in writing to the Company (and to the Trustee if given by Holders), and upon any such declaration such principal, premium, if any, and any accrued interest thereon shall become immediately due and payable. If an Event of Default specified in
Section 5.01(7) or 5.01(8) occurs, the principal of, premium, if any, and accrued interest on, all the Securities shall automatically, and without any declaration or other action on the part of the Trustee or any Holder, become immediately due and
payable. In the event a declaration of acceleration because of an Event of Default specified in Section 5.01(5) has occurred and is continuing, such declaration of acceleration shall be automatically rescinded and 

  

 45 








 
annulled if the event triggering such Event of Default pursuant to Section 5.01(5) shall be remedied, or cured or waived by the holders of the relevant
Indebtedness, within 60 days after such event of default, provided that no judgment or decree for the payment of money due on the Securities has been obtained by the Trustee. 
  
 At any time after such a declaration of acceleration has been made and before a judgment or decree for payment of the money
due has been obtained by the Trustee as hereinafter in this Article V provided, the Holders of a majority in principal amount of the Outstanding Securities, by written notice to the Company and the Trustee, may rescind and annul such declaration and
its consequences if 
  
 1. the Company has paid
or deposited with the Trustee a sum sufficient to pay 
  
 (A) all overdue interest on all Securities, 
  
 (B) the principal of (and premium, if any, on) any Securities which have become due otherwise than by such declaration of acceleration and interest thereon at the rate borne by the Securities, 
  
 (C) to the extent that payment of such interest is lawful,
interest upon overdue interest at the rate borne by the Securities, and 
  
 (D) all sums paid or advanced by the Trustee hereunder and the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel; 
  
 and 
  
 2. all Events of Default, other than the non-payment of the principal of Securities which have become due
solely by such declaration of acceleration, have been cured or waived as provided in Section 5.13. 
  
 No such rescission shall affect any subsequent default or impair any right consequent thereon. 
  
 SECTION 5.03. Collection of Indebtedness and Suits for Enforcement by Trustee. If 
  
 1. default is made in the payment of any interest on any Security when such interest becomes due and payable
and such default continues for a period of 30 days, or 
  
 2. default is made in the payment of the principal of (or premium, if any, on) any Security at the Maturity thereof, 
  
 then the Trustee is authorized to recover judgment in its own name and as trustee of an express trust against the Company for the whole amount then due and payable on
such Securities for principal (and premium, if any) and interest, and, to the extent that payment of such interest shall be legally enforceable, interest on any overdue principal (and premium, if any) and on any overdue interest, at the rate borne
by the Securities, and, in addition thereto, such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and
counsel. 
  

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 If an Event of Default occurs and is continuing, the Trustee may in its discretion proceed to protect and
enforce its rights and the rights of the Holders by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any such rights, whether for the specific enforcement of any covenant or agreement in this
Indenture or in aid of the exercise of any power granted herein, or to enforce any other proper remedy. 
  
 SECTION 5.04. Trustee May File Proofs of Claim. In case of any judicial proceeding relative to the Company (or any other obligor upon the Securities), its
property or its creditors (irrespective of whether the principal, premium, if any, or interest of the Securities 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 overdue principal, premium or interest), the Trustee shall be entitled and empowered, by intervention in such proceeding or otherwise, 
  
 1. to file and prove a claim for the whole amount of principal, premium, if any, and interest owing and
unpaid in respect of the Securities 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) and of the Holders allowed in such judicial proceeding, and 
  
 2. to collect and receive any moneys or other property payable or deliverable on any such claim and to distribute the same; 
  
 and any custodian, receiver, assignee, trustee, liquidator, sequestrator or other 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 to 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 6.07. 
  
 No provision of this Indenture shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on
behalf of any Holder any plan of or organization, arrangement, 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;
provided, however, that the Trustee may, on behalf of the Holders, vote for the election of a trustee in bankruptcy or similar official and be a member of a creditors’ or other similar committee. 
  
 SECTION 5.05. Trustee May Enforce Claims Without Possession of Securities.
All rights of action and claims under this Indenture or the Securities may be prosecuted and enforced by the Trustee without the possession of any of the Securities or the production thereof in any proceeding relating thereto, and any such
proceeding instituted by the Trustee shall be brought in its own name as trustee of an express trust, and any recovery of 

  

 47 








 
judgment shall, after provision for the payment of the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel,
be for the ratable benefit of the Holders of the Securities in respect of which such judgment has been recovered. 
  
 SECTION 5.06. Application of Money Collected. Any money collected by the Trustee pursuant to this Article V shall be applied in the following order, at
the date or dates fixed by the Trustee and, in case of the distribution of such money on account of principal (or premium, if any) or interest, upon presentation of the Securities and the notation thereon of the payment if only partially paid and
upon surrender thereof if fully paid: 
  
 FIRST: to the payment
of all amounts due the Trustee under Section 6.07; 
  
 SECOND: to
the payment of the amounts then due and unpaid for first, interest on, and, second, for principal of (and premium, if any, on) the Securities in respect of which or for the benefit of which such money has been collected, ratably, without preference
or priority of any kind, according to the amounts due and payable on such Securities for interest and principal (and premium, if any) respectively; and 
  
 THIRD: the balance, if any, to the Person or Persons entitled thereto, as their interest may appear or as a court of competent jurisdiction shall direct.

  
 SECTION 5.07. Limitation on Suits. No Holder of any Security
shall have any right to institute any, judicial or otherwise, with respect to this Indenture, or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless 
  
 1. such Holder has previously given written notice to the Trustee of a continuing Event of Default;

  
 2. the Holders of not less than 25% in
principal amount of the Outstanding Securities shall have made written request to the Trustee to institute proceedings in respect of such Event of Default in its own name as Trustee hereunder; 
  
 3. such Holder or Holders have offered to the Trustee
reasonable indemnity against the costs, expenses and liabilities to be incurred in compliance with such request; 
  
 4. the Trustee for 60 days after its receipt of such notice, request and offer of indemnity has failed to institute any such proceeding;
and 
  
 5. no direction inconsistent with such
written request has been given to the Trustee during such 60-day period by the Holders of a majority in principal amount of the Outstanding Securities; 
  
 it being understood and intended that no one or more of such Holders shall have any right in any manner whatever by virtue of, or by availing of, any provision of this
Indenture to affect, disturb or prejudice the fights of any other of such Holders, or to obtain or to seek to obtain priority or preference over any other of such Holders or to enforce any right under this Indenture, except in the manner herein
provided and for the equal and ratable benefit of all of such Holders. 
  

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 SECTION 5.08. Unconditional Right of Holders to Receive Principal, Premium and Interest and to Convert.
Notwithstanding any other provision in this Indenture, the Holder of any Security shall have the right, which is absolute and unconditional, to receive payment of the principal of (and premium, if any) and (subject to Section 3.07) interest on such
Security on the respective Stated Maturities expressed in such Security (or, in the case of redemption or repurchase, on the Redemption Date or Repurchase Date, as the case may be) and to convert such Security in accordance with Article XIII and to
institute suit for the enforcement of any such payment and right to convert, and such rights shall not be impaired without the consent of such Holder. 
  
 SECTION 5.09. Restoration of Rights and Remedies. If the Trustee or any Holder has instituted any proceeding to enforce any right or remedy under this
Indenture and such proceeding has been discontinued or abandoned for any reason, or has been determined adversely to the Trustee or to such Holder, then and in every such case, subject to any determination in such proceeding, the Company, the
Trustee and the Holders shall be restored severally and respectively to their former positions hereunder and thereafter all rights and remedies of the Trustee and the Holders shall continue as though no such proceeding had been instituted.

  
 SECTION 5.10. Rights and Remedies Cumulative. Except as
otherwise provided with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities in the last paragraph of Section 3.06, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders is intended
to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or
otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy. 
  
 SECTION 5.11. Delay or Omission Not Waiver. No delay or omission of the Trustee or of any Holder of any Securities to
exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or an acquiescence therein. Every right and remedy given by this Article V or by law to the
Trustee or to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the Trustee or by the Holders, as the case may be. 
  
 SECTION 5.12. Control by Holders. The Holders of a majority in principal amount of the Outstanding Securities shall have the right to direct the time,
method and place of conducting any proceeding for any remedy available to the Trustee or exercising any trust or power conferred on the Trustee; provided that 
  

1. such direction shall not be in conflict with any rule of law or with this Indenture, and 
  
 2. the Trustee may take any other action deemed proper by
the Trustee which is not inconsistent with such direction. 
  

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 SECTION 5.13. Waiver of Past Defaults. The Holders of not less than a majority in principal amount of the
Outstanding Securities may on behalf of the Holders of all the Securities waive any past default hereunder and its consequences, except a continuing default 
  
 1. in the payment of the principal of (or premium, if any) or interest on any Security, or 
  
 2. in respect of a covenant or provision hereof which under
Article IX cannot be modified or amended without the consent of the Holder of each Outstanding Security affected. 
  
 Upon any such waiver, such default shall cease to exist, and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other default or impair any right consequent thereon. 
  
 SECTION 5.14. Undertaking for Costs. In any suit for the enforcement of any right or remedy under this, or in any suit against the Trustee for any action
taken, suffered or omitted by it as Trustee, a court may require any party litigant in such suit to file an undertaking to pay the costs of such suit, and may assess costs against any such party litigant, having due regard to the merits and good
faith of the claims or defenses made by such party litigant; provided, that this Section 5.14 shall not be deemed to authorize any court to require such an undertaking or to make such an assessment in any suit instituted by the Company or in any
suit for the enforcement of the right to convert any Security in accordance with Article XIII. 
  
 SECTION 5.15. Waiver of Usury, Stay or Extension 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 usury, stay or extension law wherever enacted, now or at any time hereafter in force, which may affect 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 VI 
  
 The Trustee 
  
 SECTION 6.01. Certain Duties and Responsibilities. 
  
 (a) Except during the continuance of an Event of Default, 
  
 1. the Trustee undertakes to perform such duties and only
such duties as are specifically set forth in this Indenture, and no implied covenants or obligations shall be read into this Indenture against the Trustee; 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 

  

 50 








 
opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture; but in the case of
any such certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not they conform to the requirements of this
Indenture. 
  
 (b) In case an Event of Default
has occurred and is continuing, the Trustee shall exercise such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in their exercise, as a prudent Person would exercise or use under the circumstances
in the conduct of his or her own affairs. 
  
 (c)
No provision of this Indenture shall be construed to relieve the Trustee from liability for its own negligent action, its own negligent failure to act, or its own willful misconduct, except that 
  
 1. this paragraph (c) shall not be construed to limit the
effect of paragraph (a) of this Section; 
  
 2.
the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; 
  
 3. the Trustee shall not be liable with respect to any
action taken or omitted to be taken by it in good faith in accordance with the direction of the Holders of a majority in principal amount of the Outstanding Securities relating to the time, method and place of conducting any proceeding for any
remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under this Indenture; and 
  
 4. no provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any financial liability in
the performance of any of its duties hereunder, or in the exercise of any of its rights or powers. 
  
 (d) Whether or not therein expressly so provided, every provision of this Indenture relating to the conduct or affecting the liability of
or affording protection to the Trustee (as Trustee, Paying Agent, Authenticating Agent or Security Registrar) shall be subject to the provisions of this Section. 
  
 SECTION 6.02. Notice of Defaults. Within 90 days after the occurrence of any default hereunder, the Trustee shall give the
Holders, in the manner provided in Section 1.06, notice of any default hereunder actually known to a Responsible Officer of the Trustee; provided, however, that, except in the case of an Event of Default under Section 5.01(1), (2) or (3), the
Trustee shall be protected in withholding such notice if and so long as the board of directors, the executive committee or a trust committee of directors or Responsible Officers of the Trustee in good faith determines that the withholding of such
notice is in the interest of the Holders. The Trustee shall not be deemed to have notice of a default unless (i) the Trustee has received written notice thereof from the Company or any Holder or (ii) a Responsible Officer of the Trustee shall have
actual knowledge thereof. For the purpose of this Section, the term “default” means any event which is, or after notice or lapse of time or both would become, an Event of Default. 
  

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 SECTION 6.03. Certain Rights of Trustee. Subject to the provisions of Section 6.01: 
  
 (a) the Trustee may 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) 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 shall be sufficiently evidenced by a
Board Resolution; 
  
 (c) 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
require and, in the absence of bad faith on its part, rely upon an Officers’ Certificate; 
  
 (d) the Trustee may consult with counsel and the written advice of such counsel or any Opinion of Counsel shall be full and complete
authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon; 
  
 (e) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or
direction of any of the Holders pursuant to this Indenture, unless such Holders shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities which might be incurred by it in compliance with such
request or direction; 
  
 (f) 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; and 
  
 (g) 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. 
  
 SECTION 6.04. Not Responsible for Recitals or Issuance of Securities. The recitals contained herein and in the Securities,
except the Trustee’s certificates of authentication, shall be taken as the statements of the Company, and neither the Trustee nor any Authenticating Agent assumes any responsibility for their correctness. The Trustee makes no representations as
to the validity or sufficiency of this Indenture or of the Securities. Neither the Trustee nor any Authenticating Agent shall be accountable for the use or application by the Company of Securities or the proceeds thereof. 
  

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 SECTION 6.05. May Hold Securities. The Trustee, any Authenticating Agent, any Paying Agent, any Security
Registrar or any other agent of the Company, in its individual or any other capacity, may become the owner or pledgee of Securities and, subject to Section 6.08 and Section 6.13, may otherwise deal with the Company with the same rights it would have
if it were not Trustee, Authenticating Agent, Paying Agent, Security Registrar or such other agent. 
  
 SECTION 6.06. Money Held in Trust. Money held by the Trustee in trust hereunder need not be segregated from other funds except to the extent required by
law. The Trustee shall be under no liability for interest on any money received by it hereunder except as otherwise agreed with the Company. 
  
 SECTION 6.07. Compensation and Reimbursement. The Company agrees: 
  
 1. to pay to the Trustee from time to time reasonable compensation for all services rendered by it hereunder
(which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust); 
  
 2. except as otherwise expressly provided herein, 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 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 
  
 3. to indemnify the Trustee for, and to hold it harmless against, any loss, liability or expense incurred without negligence, willful misconduct or bad faith on its part, arising out of or in connection with the acceptance or administration
of this trust, including the costs and expenses of defending itself against any claim or liability in connection with the exercise or performance of any of its powers or duties hereunder. The Trustee shall notify the Company of any claim asserted
against it for which it may seek indemnity. 
  
 4. All indemnifications and releases from liability granted hereunder to the Trustee shall extend to its officers, directors, employees, agents, successors and assigns. 
  
 5. When the Trustee incurs expenses or renders services after the occurrence of any Event of Default
specified in Section 5.01, the expenses and the compensation for the services are intended to constitute expenses of administration under any bankruptcy, insolvency or similar laws. 
  
 6. The obligations of the Company under this Section shall survive the satisfaction and discharge of this
Indenture. 
  
 SECTION 6.08. Disqualification: Conflicting
Interests. If the Trustee has or shall acquire a conflicting interest within the meaning of the Trust Indenture Act, the Trustee shall either eliminate such interest or resign, to the extent and in the manner provided by, and subject to the
provisions of, the Trust Indenture Act and this Indenture. 
  

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 SECTION 6.09. Corporate Trustee Required; Eligibility. There shall at all times be a Trustee hereunder
which shall be a corporation organized and doing business under the laws of the United States, authorized under such laws to exercise corporate trust powers, which shall have (or, in the case of a corporation included in a bank holding company
system, the related bank holding company shall have) a combined capital and surplus of at least U.S.$50,000,000, subject to supervision or examination by federal or state authority, in good standing and having an established place of business or
agency in the Borough of Manhattan, The City of New York or, Houston, Texas. If such corporation or related bank holding company publishes reports of condition at least annually, pursuant to law or to the requirements of said supervising or
examining authority, then for the purposes of this Section, the combined capital and surplus of such corporation or related bank holding company shall be deemed to be its combined capital and surplus as set forth in its most recent report of
condition so published. If at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section, it shall resign immediately in the manner and with the effect hereinafter specified in this Article. 
  
 SECTION 6.10. Resignation and Removal; Appointment of Successor. (a) No
resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to this Article shall become effective until the acceptance of appointment by the successor Trustee in accordance with the applicable requirements of Section
6.11. 
  
 (b) The Trustee may resign at any time
by giving written notice thereof to the Company. If the instrument of acceptance by a successor Trustee required by Section 6.11 shall not have been delivered to the Trustee within 30 days after the giving of such notice of resignation, the
resigning Trustee may petition any court of competent jurisdiction for the appointment of a successor Trustee. 
  
 (c) The Trustee may be removed at any time by Act of the Holders of a majority in principal amount of the Outstanding Securities,
delivered to the Trustee and to the Company. 
  
 (d) If at any time: 
  
 1. the Trustee
shall fail to comply with Section 6.08 after written request therefor by the Company or by any Holder who has been a bona fide Holder of a Security for at least six months, or 
  
 2. the Trustee shall cease to be eligible under Section 6.09 and shall fail to resign after written request
therefor by the Company or by any such Holder, or 
  
 3. the Trustee shall become incapable of acting or shall be adjudged a bankrupt or insolvent or a receiver of the Trustee or of its property shall be appointed or any public officer shall take charge or control of the Trustee or of its
property or affairs for the purpose of rehabilitation, conservation or liquidation, then, in any such case, (i) the Company by a Board Resolution may remove the Trustee, or (ii) subject to Section 5.14, any Holder who has been a bona fide Holder of
a Security for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee. 
  

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 (e) If the Trustee shall resign, be removed or become incapable of acting, or if a
vacancy shall occur in the office of Trustee for any cause, the Company, by a Board Resolution, shall promptly appoint a successor Trustee. If, within one year after such resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee shall be appointed by Act of the Holders of a majority in principal amount of the Outstanding Securities delivered to the Company and the retiring Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance of
such appointment in accordance with the applicable requirements of Section 6.11, become the successor Trustee and to that extent supersede the successor Trustee appointed by the Company. If no successor Trustee shall have been so appointed by the
Company or the Holders and accepted appointment in the manner required by Section 6.11, any Holder who has been a bona fide Holder of a Security for at least six months may, on behalf of himself and all others similarly situated, petition any court
of competent jurisdiction for the appointment of a successor Trustee. 
  
 (f) The Company shall give notice of each resignation and each removal of the Trustee and each appointment of a successor Trustee to all Holders in the manner provided in Section 1.06. Each notice shall include the
name of the successor Trustee and the address of its Corporate Trust Office. 
  
 SECTION 6.11. Acceptance of Appointment by Successor. Every successor Trustee appointed hereunder shall execute, acknowledge and deliver to the Company and to the retiring Trustee an instrument accepting such
appointment, and thereupon the resignation or removal of the retiring Trustee shall become effective and such successor Trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the
retiring Trustee; but, on the request of the Company or the successor Trustee, such retiring Trustee shall, upon payment of its charges, execute and deliver an instrument transferring to such successor Trustee all the rights, powers and trusts of
the retiring Trustee and shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder. Upon request of any such successor Trustee, the Company shall execute any and all instruments
for more fully and certainly vesting in and confirming to such successor Trustee all such rights, powers and trusts. 
  
 No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible under this
Article. 
  
 SECTION 6.12. Merger, Conversion, Consolidation or
Succession to Business. Any corporation into which the Trustee may be merged or converted or with which it may be Consolidated, or any corporation resulting from any merger, conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder, provided such corporation shall be otherwise qualified and eligible under this Article, without the
execution or filing of any paper or any further act on the part of any of the parties hereto. In case any Securities shall have been authenticated, but not delivered, by the Trustee then in office, any successor by merger, conversion or
consolidation to such authenticating Trustee may adopt such authentication and deliver the Securities so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities. 
  

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 SECTION 6.13. Preferential Collection of Claims Against Company. If and when the Trustee shall be or
become a creditor of the Company (or any other obligor upon the Securities), the Trustee shall be subject to the provisions of the Trust Indenture Act regarding the collection of claims against the Company (or any such other obligor). 
  
 SECTION 6.14. Appointment of Authenticating Agent. The Trustee may appoint an
Authenticating Agent or Agents which shall be authorized to act on behalf of the Trustee to authenticate Securities issued upon original issue and upon exchange, registration of transfer, partial conversion, partial redemption, or partial repurchase
or pursuant to Section 3.06, and Securities so authenticated shall be entitled to the benefits of this Indenture and shall be valid and obligatory for all purposes as if authenticated by the Trustee hereunder. Wherever reference is made in this
Indenture to the authentication and delivery of Securities by the Trustee or the Trustee’s certificate of authentication, such reference shall be deemed to include authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an Authenticating Agent. Each Authenticating Agent shall be acceptable to the Company and shall at all times be a corporation organized and doing business under the laws of the
United States, authorized under such laws to act as Authenticating Agent, which shall have (or, in the case of a corporation included in a bank holding company system, the related bank holding company shall have) a combined capital and surplus of
not less than U.S.$50,000,000 and subject to supervision or examination by Federal or State authority. If such Authenticating Agent publishes reports of condition at least annually, pursuant to law or to the requirements of said supervising or
examining authority, then, for the purposes of this Section, the combined capital and surplus of such Authenticating Agent or related bank holding company shall be deemed to be its combined capital and surplus as set forth in its most recent report
of condition so published. If at any time an Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, such Authenticating Agent shall resign immediately in the manner and with the effect specified in this
Section. 
  
 Any corporation into which an Authenticating Agent
may be merged or converted or with which it may be Consolidated, or any corporation resulting from any merger, conversion or consolidation to which such Authenticating Agent shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an Authenticating Agent, provided such corporation shall be otherwise eligible under this Section, without the execution or filing of any paper or any further act on the part
of the Trustee or the Authenticating Agent. 
  
 An Authenticating
Agent may resign at any time by giving written notice thereof to the Trustee and to the Company. The Trustee may at any time terminate the agency of an Authenticating Agent by giving written notice thereof to such Authenticating Agent and to the
Company. Upon receiving such a notice of resignation or upon such a termination, or in case at any time such Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, the Trustee may appoint a successor
Authenticating Agent which shall be acceptable to the Company and shall mail written notice of such appointment by first-class mail, postage prepaid, to all Holders as their names and addresses appear in the Security Register. Any successor
Authenticating Agent upon acceptance of its appointment hereunder shall become vested with all the rights, powers and duties of its predecessor hereunder, with like effect as if originally named as an Authenticating Agent. No successor
Authenticating Agent shall be appointed unless eligible under the provisions of this Section. 
  

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 The Trustee agrees to pay to each Authenticating Agent from time to time reasonable compensation for its
services under this Section, and the Trustee shall be entitled to be reimbursed for such payments, subject to the provisions of Section 6.07. 
  
 If an appointment is made pursuant to this Section, the Securities may have endorsed thereon, in addition to the Trustee’s certificate of
authentication, an alternative certificate of authentication in the following form: 
  
 This is one of the Securities described in the within-mentioned Indenture. 
  

			
	  


	 	 	As Trustee
		
	By	 	  


	 	 	As Authenticating Agent
		
	By	 	  


	 	 	Authorized Signatory


  
 SECTION 6.15.
Appointment of Co-Trustee. Subject to the qualifications set forth in Section 6.09, the Trustee may appoint an additional institution as a separate trustee or co-trustee. If the Trustee appoints an additional institution as a separate trustee or
co-trustee, each and every remedy, power, fight, claim, deed, cause of action, immunity, estate, duty, obligation, title, interest and lien expressed or intended by this Indenture to be exercised by, vested in and conveyed by the Trustee with
respect thereto shall be exercisable by, vested in and conveyed to such separate trustee or co-trustee, but only to the extent necessary to enable such separate trustee or co-trustee to exercise such powers, rights and remedies, and every covenant
and obligation necessary for the exercise thereby by such separate trustee or co-trustee shall run to and be enforceable by either of them. Should any instrument in writing from the Company be required by the separate trustee or co-trustee so
appointed by the Trustee for more fully vesting in and confirming to them such properties, rights, powers, trusts, duties and obligations, any and all such instruments in writing shall, on request, be executed, acknowledged and delivered by the
Company. If any separate trustee or co-trustee, or a successor to either, shall become incapable of acting or not qualified to act, resign or be removed, all the estate, properties, rights, powers, trusts, duties and obligations of such separate
trustee or co-trustee, so far as permitted by law, shall vest in and be exercised by the Trustee until the appointment of a successor to such separate trustee or co-trustee. The appointment of any separate trustee or co-trustee shall be subject to
written approval of the Company so long as no Event of Default has occurred and is continuing under this Indenture. 
  

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 ARTICLE VII 
  
 Holders’ Lists and Reports by Trustee and Company 
  
 SECTION 7.01. Company to Furnish Trustee Names and Addresses of Holders. The Company will furnish or cause to be furnished to the Trustee 
  
 (a) semi-annually, not more than 15 days after each Regular
Record Date, a list, in such form as the Trustee may reasonably require, of the names and addresses of the Holders as of such Regular Record Date, and 
  
 (b) at such other times as the Trustee may request in writing, within 30 days after the receipt by the Company of any such request, a list
of similar form and content as of a date not more than 15 days prior to the time such list is furnished; excluding from any such list names and addresses received by the Trustee in its capacity as Security Registrar. 
  
 SECTION 7.02. Preservation of Information; Communications to Holders.

  
 (a) The Trustee shall preserve, in as current
a form as is reasonably practicable, the names and addresses of Holders contained in the most recent list furnished to the Trustee as provided in Section 7.01 and the names and addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in Section 7.01 upon receipt of a new list so furnished. 
  
 (b) The rights of Holders to communicate with other Holders with respect to their rights under this Indenture or under the Securities, and
the corresponding rights and duties of the Trustee, shall be as provided by the Trust Indenture Act. 
  
 (c) Every Holder, by receiving and holding the Securities, agrees with the Company and the Trustee that neither the Company nor the
Trustee nor any agent of either of them shall be held accountable by reason of any disclosure of information as to names and addresses of Holders made pursuant to the Trust Indenture Act. 
  
 SECTION 7.03. Reports by Trustee. 
  

(a) The Trustee shall transmit to Holders such reports concerning the Trustee and its actions under this Indenture as may be required
pursuant to the Trust Indenture Act at the times and in the manner provided pursuant thereto. 
  
 (b) A copy of each such report shall, at the time of such transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission, if applicable, and with the Company. The Company will notify the Trustee when the Securities are listed on any stock exchange. 
  
 SECTION 7.04. Reports by Company. 
  

(a) The Company shall file with the Trustee and the Commission, if applicable, and transmit to Holders, such information, documents and
other reports, and such summaries thereof, as may be required pursuant to the Trust Indenture Act at the 

  

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times and in the manner provided pursuant to such Act; provided that any such information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Exchange Act shall be filed with the Trustee within 15 days after the same is so required to be filed with the Commission. Notwithstanding anything to the contrary contained herein, the Trustee shall have no
duty to review such documents for the purpose of determining compliance with this Indenture. 
  
 (b) The Company shall provide the Trustee with at least 30 days’ prior notice of any change in location of its principal executive
offices or other principal place of business. 
  
 ARTICLE VIII

  
 Consolidation, Merger, Conveyance, Transfer or Lease

  
 SECTION 8.01. Company May Consolidate, Etc., Only on Certain
Terms. The Company shall not consolidate with or merge into any other Person or, directly or indirectly, convey, transfer, sell, lease or otherwise dispose of all or substantially all of its properties and assets (such amounts to be computed on a
Consolidated basis) to any Person, and the Company shall not permit any Person to consolidate with or merge into the Company or convey, transfer, sell, lease or otherwise dispose of all or substantially all of its properties and assets to the
Company, in either case whether in a single transaction or a series of related transactions, unless: 
  
 1. in case the Company shall consolidate with or merge into another Person or convey, transfer or lease all or substantially all of its
properties and assets to any Person, the Person formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or transfer, or which leases, all or substantially all of the properties and assets of the
Company shall be a corporation organized and validly existing under the laws of the United States of America, any State thereof or the District of Columbia and shall expressly assume, by an indenture supplemental hereto, executed and delivered to
the Trustee, in form satisfactory to the Trustee, the due and punctual payment of the principal of (and premium, if any) and interest on all the Securities and the performance or observance of every covenant of this Indenture on the part of the
Company to be performed or observed and shall have provided for conversion rights in accordance with Article XIII; 
  
 2. immediately after giving effect to such transaction, no Event of Default, and no event which, after notice or lapse of time or both,
would become an Event of Default, shall have happened and be continuing; 
  
 3. unless such transaction is solely the merger of the Company and one of the Company’s Wholly Owned Subsidiaries in a transaction which is not for the purpose of evading this provision and not in connection with
any other transaction, immediately after giving effect to such transaction on a pro forma basis, the Consolidated Net Worth of the Consolidated, resulting, surviving or transferee entity is at least equal to the Consolidated Net Worth of the Company
immediately prior to such transaction; and 
  

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 4. the Company has 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 and that all conditions
precedent herein provided for relating to such transaction have been complied with. 
  
 SECTION 8.02. Successor Substituted. Upon any consolidation of the Company with, or merger of the Company into, any other Person or any conveyance, transfer or lease of all or substantially all of the properties and
assets of the Company in accordance with Section 8.01, the successor Person formed by such consolidation or into which the Company is merged or 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 under this Indenture with the same effect as if such successor Person had been named as the Company herein, and thereafter, except in the case of a lease, the predecessor Person shall be released from
its obligations and covenants under this Indenture and the Securities. 
  
 ARTICLE IX 
  
 Supplemental Indentures 
  
 SECTION 9.01. Supplemental Indentures Without Consent of Holders. Without the
consent of any Holders, the Company, when authorized by a Board Resolution, and the Trustee, at any time and from time to time, may enter into one or more indentures supplemental hereto or amendments to this Indenture or the Securities, in each case
in a form satisfactory to the Trustee, for any of the following purposes: 
  
 1. to evidence the succession of another Person to the Company and the assumption by any such successor of the covenants of the Company herein and in the Securities; or 
  
 2. to add to the covenants of the Company for the equal and
ratable benefit of the Holders, or to surrender any right or power herein conferred upon the Company; or 
  
 3. to secure the Company’s obligations in respect of the Securities; or 
  
 4. to make provision with respect to the conversion rights
of Holders pursuant to the requirements of Article XIII or to reduce the Conversion Price provided that the reduction shall not adversely affect the interests of the Holders of the Securities; or 
  
 5. to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee; or 
  
 6. to
provide for uncertificated Securities in addition to or in place of certificated Securities; or 
  
 7. to add any additional Events of Default for the benefit of Holders; or 
  

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 8. to cure any ambiguity, omission, defect or inconsistency, to correct or supplement any
provision herein which may be defective or inconsistent with any other provision herein, to correct or supplement any provision herein which limits, qualifies or conflicts with a provision of the Trust Indenture Act which is required under such Act
to be a part of and govern this Indenture, in any case to the extent necessary to qualify this Indenture under the Trust Indenture Act, or to make any other provisions with respect to matters or questions arising under this Indenture which shall not
be inconsistent with the provisions of this Indenture; provided that such action pursuant to this clause (8) shall not adversely affect the interests or legal rights of the Holders in any material respect. 
  
 SECTION 9.02. Supplemental Indentures With Consent of Holders. With the
consent of the Holders of not less than a majority in principal amount of the Outstanding Securities, by the Act of said Holders delivered to the Company and the Trustee, the Company, when authorized by a Board Resolution, and the Trustee may enter
into an indenture or indentures supplemental hereto or amendments to this Indenture or the Securities for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or of modifying in any
manner the rights of the Holders under this Indenture; provided, however, that no such supplemental indenture shall, without the consent of the Holder of each Outstanding Security affected thereby, 
  
 1. change the Stated Maturity of the principal of, or any installment of
interest on, any Security, or reduce the principal amount thereof or the rate of interest thereon or any premium payable upon the redemption thereof, or change the place of payment where, or the coin or currency in which, any Security or any premium
or interest thereon is payable, or impair the right to institute suit for the enforcement of any such payment on or after the Stated Maturity thereof (or, in the case of redemption or repurchase, on or after the Redemption Date or Repurchase Date,
as the case may be), or adversely affect the right to convert any Security as provided in Article XIII (except as permitted by Section 9.01(4)), or modify the redemption provisions in a manner adverse to the Holders, reduce the Repurchase Price
relating to the Company’s requirement to offer to repurchase Securities upon a Change of Control after a Change of Control has occurred, or 
  
 2. modify any of the provisions of this Section 9.02, Section 5.13 or Section 10.08, except to increase any such percentage or to provide
that certain other provisions of this Indenture cannot be modified or waived without the consent of the Holder of each Outstanding Security affected thereby, or 
  
 3. modify the obligation of the Company to maintain an office or agency in the Borough of Manhattan, The
City of New York or Houston, Texas pursuant to Section 10.02, or 
  
 4. modify any of the provisions of Section 10.10, or 
  
 5. cause the Securities to become contractually subordinate in right of payment to any other Indebtedness; or 
  

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 6. reduce the percentage in principal amount of the Outstanding Securities, the consent
of whose Holders is required for any such supplemental indenture, or the consent of whose Holders is required for any waiver (of compliance with certain provisions of this Indenture or certain defaults hereunder and their consequences) provided for
in this Indenture. 
  
 It shall not be necessary for any Act of
Holders under this Section to approve the particular form of any proposed supplemental indenture or amendment, but it shall be sufficient if such Act shall approve the substance thereof. 
  
 SECTION 9.03. Execution of Supplemental Indentures and Amendments. In executing, or accepting the additional trusts created
by, any supplemental indenture or amendment to this Indenture or the Securities permitted by this Article IX or the modifications thereby of the trusts created by this Indenture, the Trustee shall be entitled to receive, and (subject to Section 6.01
and Section 6.03) shall be fully protected in relying upon, an Opinion of Counsel stating that the execution of such supplemental indenture or amendment to this Indenture or the Securities is authorized or permitted by this Indenture, complies with
its terms and will, upon the execution and delivery thereof, be valid and binding upon the Company in accordance with its terms. The Trustee may, but shall not be obligated to, enter into any such supplemental indenture or amendment to this
Indenture or the Securities which affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise. 
  
 SECTION 9.04. Effect of Supplemental Indentures and Amendments. Upon the execution of any supplemental indenture or amendment to this Indenture or the
Securities under this Article, this Indenture or the Securities, as applicable, shall be modified in accordance therewith, and such supplemental indenture or amendment to this Indenture or the Securities 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. 
  
 SECTION 9.05. Conformity with Trust Indenture Act. Every supplemental indenture or amendment to this Indenture or the Securities executed pursuant to this
Article shall conform to the requirements of the Trust Indenture Act. 
  
 SECTION 9.06. Reference in Securities to Supplemental Indentures. Securities authenticated and delivered after the execution of any supplemental indenture or amendment to this Indenture or the Securities 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 or amendment to this Indenture or the Securities. If the Company shall so determine, new Securities so
modified as to conform, in the judgment of the Trustee and the Company, to any such supplemental indenture or amendment to this Indenture or the Securities may be prepared and executed by the Company and authenticated and delivered by the Trustee in
exchange for Outstanding Securities. 
  
 SECTION 9.07. Notice of
Supplemental Indentures. Promptly after the execution by the Company and the Trustee of any supplemental indenture or amendment to this Indenture or the Securities pursuant to the provisions of Section 9.01, the Company shall give notice to all
Holders affected thereby of such fact, setting forth in general terms the substance of 

  

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such supplemental indenture or amendment, in the manner provided in Section 1.06. Any failure of the Company to give such notice, or any defect therein,
shall not in any way impair or affect the validity of any such supplemental indenture or amendment. 
  
 ARTICLE X 
  
 Covenants 
  
 SECTION 10.01. Payment of Principal,
Premium and Interest. The Company will duly and punctually pay the principal of (and premium, if any) and interest on the Securities in accordance with the terms of the Securities and this Indenture. 
  
 SECTION 10.02. Maintenance of Office or Agency. The Company will maintain in
the Borough of Manhattan, The City of New York or Houston, Texas an office or agency where Securities may be presented or surrendered for payment, where Securities may be surrendered for registration of transfer or exchange, where Securities may be
surrendered for conversion and where notices and demands to or upon the Company in respect of the Securities and this Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in the
location, of such office or agency. 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 Corporate Trust Office of the Trustee or the office or agency of the Trustee in the Borough of Manhattan, The City of New York, and the Company hereby appoints the Trustee as its agent to receive all such presentations, surrenders,
notices and demands. 
  
 The Company may also from time to time
designate one or more other offices or agencies (in or outside the Borough of Manhattan, The City of New York or Houston, Texas) 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 offices or agencies in the Borough of Manhattan, The City of New York or Houston, Texas for such purposes.
The Company will give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or agency. 
  
 SECTION 10.03. Money for Security Payments to Be Held in Trust. If the Company shall at any time act as its own Paying
Agent, it will, on or before each due date of the principal of (and premium, if any) or interest on any of the Securities, segregate and hold in trust for the benefit of the Persons entitled thereto a sum in immediately available funds sufficient to
pay the principal (and premium, if any) or interest so becoming due until such sums shall be paid to such Persons or otherwise disposed of as herein provided and will promptly notify the Trustee of its action or failure so to act. 
  
 Whenever the Company shall have one or more Paying Agents, it will, prior to
each due date of the principal of (and premium, if any) or interest on any Securities, deposit with a Paying Agent a sum in immediately available funds sufficient to pay such amount, such sum to be held in trust for the benefit of the Persons
entitled to such principal, premium, if any, or interest, and (unless such Paying Agent is the Trustee) the Company will promptly notify the Trustee of its action or failure so to act. 
  

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 The Company will cause each Paying Agent other than the Trustee to execute and deliver to the Trustee an
instrument in which such Paying Agent shall agree with the Trustee, subject to the provisions of this Section 10.03, that such Paying Agent will: 
  
 1. hold all sums held by it for the payment of the principal of, premium, if any, or interest on Securities in trust for the benefit of
the Persons entitled thereto until such sums shall be paid to such Persons or otherwise disposed of as herein provided; 
  
 2. give the Trustee notice of any default by the Company (or any other obligor upon the Securities) in the making of any payment of
principal, premium, if any, or interest; and 
  
 3. at any time during the continuance of any such default, upon the written request of the Trustee, forthwith pay to the Trustee all sums so held in trust by such Paying Agent. 
  
 The Company may at any time, for the purpose of obtaining the satisfaction and discharge of this Indenture or for any other
purpose, pay, or by Company Order direct any Paying Agent to pay, to the Trustee all sums held in trust by the Company or such Paying Agent, such sums to be held by the Trustee upon the same trusts as those upon which such sums were held by the
Company or such Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such Paying Agent shall be released from all further liability with respect to such money. 
  
 Any money deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the
principal of (and premium, if any) or interest on any Security and remaining unclaimed for two years after such principal (and premium, if any) or interest has become due and payable shall be paid to the Company on Company Request, or (if then held
by the Company) shall be discharged from such trust; and the Holder of such Security shall thereafter, as an unsecured general creditor, look only to the Company for payment thereof, and all liability of the Trustee or such Paying Agent with respect
to such trust money, and all liability of the Company as trustee thereof, shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, may at the expense of the Company cause to
be published once, in a newspaper published in the English language, customarily published on each Business Day and of general circulation in the Borough of Manhattan, The City of New York, notice that such money remains unclaimed and that, after a
date specified therein, which shall not be less than 30 days from the date of such publication, any unclaimed balance of such money then remaining will be repaid to the Company. 
  
 SECTION 10.04. Statement by Officers as to Default. The Company will deliver to the Trustee, within 120 days after the end
of each fiscal year of the Company ending after the date hereof, 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. 
  

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 The Company will deliver to the Trustee, forthwith upon becoming aware of any default or any Event of
Default under the Indenture, an Officers’ Certificate specifying with particularity such default or Event of Default and further stating what action the Company has taken, is taking or proposes to take with respect thereto. For the purpose of
this Section, the term “default” means any event that is, or after notice or lapse of time or both would become, an Event of Default. 
  
 Any notice required to be given under this Section 10.04 shall be delivered to the Trustee at its Corporate Trust Office. 
  
 SECTION 10.05. Existence. Subject to Article VIII, the Company will do or
cause to be done all things necessary to preserve and keep in full force and effect its existence, rights (charter and statutory) and franchises; provided, however, that the Company shall not be required to preserve any such right or franchise if
the Board of Directors shall determine that the preservation thereof is no longer desirable in the conduct of the business of the Company and that the loss thereof is not disadvantageous in any material respect to the Holders. 
  
 SECTION 10.06. Maintenance of Properties. The Company will cause all
properties used or useful in the conduct of its business or the business of any Subsidiary to be maintained and kept in good condition, repair and working order and supplied with all necessary equipment and will cause to be made all necessary
repairs, renewals, replacements, betterments and improvements thereof, all as in the judgment of the Company may be necessary so that the business carried on in connection therewith may be properly and advantageously conducted at all times;
provided, however, that nothing in this Section shall prevent the Company from discontinuing the operation or maintenance of any of such properties, or disposing of any of them, if such discontinuance or disposition is, in the judgment of the
Company, desirable in the conduct of its business or the business of any Subsidiary and not disadvantageous in any material respect to the Holders. 
  
 SECTION 10.07. Payment of Taxes and Other Claims. The Company will pay or discharge or cause to be paid or discharged, before the same shall become
delinquent, (1) all taxes, assessments and governmental charges levied or imposed upon the Company or any Subsidiary or upon the income, profits or property of the Company or any Subsidiary and (2) all lawful claims for labor, materials and supplies
which, if unpaid, might by law become a lien upon the property of the Company or any Subsidiary; provided, however, that, in the case of either clause (1) or (2), the Company shall not be required to pay or discharge or cause to be paid or
discharged any such tax, assessment, charge or claim whose amount, applicability or validity is being contested in good faith by appropriate proceedings. 
  
 SECTION 10.08. Waiver of Certain Covenants. The Company may omit in any particular instance to comply with any covenant or condition set forth in Sections
10.05 to 10.07, inclusive, if before the time for such compliance the Holders of at least a majority in principal amount of the Outstanding Securities shall, by Act of such Holders, either waive such compliance in such instance or generally waive
compliance with such covenant or condition, but 

  

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no such waiver shall extend to or affect such covenant or condition except to the extent so expressly waived, and, until such waiver shall become effective,
the obligations of the Company and the duties of the Trustee in respect of any such covenant or condition shall remain in full force and effect. 
  
 SECTION 10.09. Registration and Listing. The Company will list, subject to notice of issuance, any shares of Common Stock issuable upon conversion of the
Securities on the Nasdaq National Market. 
  
 SECTION 10.10.
Delivery of Certain Information. 
  
 (a) Whether
or not required by the rules and regulations of the Commission, so long as there are any Outstanding Securities, the Company shall furnish the Holders (i) all quarterly and annual financial information that would be required to be contained in a
filing with the Commission on Forms 10-Q and 10-K (or any successor Forms) if the Company were required to file such Forms, including a “Management’s Discussion and Analysis of Financial Condition and Results of Operations” (or a
successor provision) that describes the Company’s Consolidated financial condition and results of operations and, with respect to the annual information only, a report thereon by the Company’s certified independent accountants; and (ii)
all current reports that would be required to be filed with the Commission on Form 8-K (or any successor Form) if the Company were required to file such reports, in each case within the time periods specified in the Commission’s rules and
regulations. 
  
 (b) At any time when the Company
is not subject to Section 13 or l5(d) of the Exchange Act, upon the request of a Holder or the holder of shares of Common Stock issued upon conversion thereof, the Company will promptly furnish or cause to be furnished Rule 144A Information (as
defined below) to such Holder or such 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 or 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 10.11. Limitation on Senior Secured
and Acquisition Indebtedness. The Company shall not, directly or indirectly, issue, assume, guaranty, incur, become directly or indirectly liable with respect to, or otherwise become responsible for, contingently or otherwise, any Senior Secured
Indebtedness or Acquired Indebtedness, other than Permitted Indebtedness. The addition, amendment or other modification of the subordination provisions of any Indebtedness of the Company or of any Lien securing Indebtedness of the Company shall
constitute an incurrence of new Indebtedness, which incurrence must comply with this Section 10.11. The limitation set forth in this Section 10.11, however, shall not apply to the incurrence of the following: 
  
 (a) Senior Secured Indebtedness incurred by the Company not
otherwise included as “Permitted Indebtedness” in an aggregate amount incurred and outstanding at any time pursuant to this clause (a) (plus any Refinancing Indebtedness incurred to repay, redeem, discharge, retire, defease, refinance,
replace or refund such Indebtedness) not to exceed $20.0 million; and 
  

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 (b) Acquired Indebtedness; provided that any such Acquired Indebtedness incurred pursuant
to this clause (b): 
  
 (1) was incurred prior
to the time that the debtor thereunder was acquired or merged into the Company or prior to the time that the related asset was acquired by us, and was not incurred in connection with, or in contemplation of, such acquisition or merger and

  
 (2) if on the date of incurrence of such
Acquired Indebtedness, immediately after giving effect on a pro forma basis to all proposed or pending Acquisition or Acquisitions (including the incurrence of all such Acquired Indebtedness) and to the incurrence of all Senior Secured Indebtedness
permitted by Section 10.11(a), the Consolidated Net Leverage Ratio of the Company is the same or lesser than the Consolidated Net Leverage Ratio of the Company immediately prior to such Acquisition or Acquisitions. 
  
 Indebtedness of any Person that is outstanding at the time such Person becomes a Subsidiary
of the Company (including upon designation of any Person as a Subsidiary) or is merged with or into or Consolidated with the Company or one of its Subsidiaries shall be deemed to have been incurred at the time such Person becomes or is designated a
Subsidiary of the Company or is merged with or into or Consolidated with the Company or one of its Subsidiaries, as applicable. 
  
 Upon each incurrence of Indebtedness, the Company may designate pursuant to which provision of this under this Section 10.11 (including which portion of the definition of
Permitted Indebtedness) such Indebtedness is being incurred and may subdivide an amount of Indebtedness and such Indebtedness shall not be deemed to have been incurred or outstanding under any other provision of this covenant (or other portion of
the definition of Permitted Indebtedness), except that all Indebtedness under the Credit Agreement shall be deemed to have been incurred pursuant to clause (A) of the definition of Permitted Indebtedness. 
  
 SECTION 10.12. Limitation on Dividends. The Company shall not, directly or
indirectly, declare or pay any dividend or other distribution in respect of Common Stock, except to the extent such dividend or other distribution is payable solely in shares of Qualified Capital Stock. 
  
 SECTION 10.13. Limitation on Status as Investment Company. Neither the
Company nor any of its Subsidiaries shall become an “investment company” (as that term is defined in the Investment Company Act of 1940 as amended), or otherwise become subject to regulation under the Investment Company Act. 
  

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 ARTICLE XI 
  
 Redemption of Securities 
  
 SECTION 11.01. Right of Redemption. The Securities may be redeemed at the election of the Company, as a whole or from time to time in part, at any time,
at the Redemption Prices specified in the form of Security hereinbefore set forth, together with accrued interest to the Redemption Date. 
  
 SECTION 11.02. Applicability of Article. Redemption of Securities at the election of the Company or otherwise, as permitted or required by any provision
of the Securities or this Indenture, shall be made in accordance with such provision and this Article XI. 
  
 SECTION 11.03. Election to Redeem; Notice to Trustee. The election of the Company to redeem any Securities pursuant to Section 11.01 shall be evidenced by
a Board Resolution. In case of any redemption at the election of the Company, the Company shall, at least 40 days prior to the Redemption Date fixed by the Company (unless a shorter notice shall be satisfactory to the Trustee), notify the Trustee of
such Redemption Date and of the principal amount of Securities to be redeemed. 
  
 SECTION 11.04. Selection by Trustee of Securities to Be Redeemed. If less than all the Securities are to be redeemed, the particular Securities to be redeemed shall be selected not less than 20 days or more than 40
days prior to the Redemption Date by the Trustee, from the Outstanding Securities not previously called for redemption, by such method as the Trustee shall deem fair and appropriate in the circumstances and which may provide for the selection for
redemption of portions (equal to U.S.$1,000 or any integral multiple thereof) of the principal amount of Securities of a denomination larger than U.S.$1,000. 
  
 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 shall be treated by the
Trustee as Outstanding for the purpose of such selection. 
  
 The
Trustee shall promptly notify the Company and each Security Registrar in writing of the Securities selected for redemption and, in the case of any Securities selected for partial redemption, the principal amount thereof to be redeemed. 

 
 For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the case of any Securities redeemed or to be redeemed only in part, to the portion of the principal amount of such Securities which has been or is to be redeemed. 

 
 SECTION 11.05. Notice of Redemption. Notice of redemption shall be given
by first-class mail, postage prepaid, mailed not less than 20 nor more than 40 days prior to the Redemption Date, to each Holder of Securities to be redeemed, at his address appearing in the Security Register. 
  

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 All notices of redemption shall state: 
  
 1. the Redemption Date, 
  
 2. the Redemption Price, 
  
 3. if less than all the Outstanding Securities are to be redeemed, the identification (and, in the case of
partial redemption of any Securities, the principal amounts) of the particular Securities to be redeemed, 
  
 4. that on the Redemption Date the Redemption Price will become due and payable upon each such Security to be redeemed and that interest
thereon will cease to accrue on and after said date, 
  
 5. the Conversion Price, the date on which the right to convert the Securities to be redeemed will terminate and the place or places where such Securities may be surrendered for conversion, and 
  
 6. the place or places where such Securities are to be
surrendered for payment of the Redemption Price. Notice of redemption of Securities to be redeemed at the election of the Company shall be given by the Company or, at the Company’s request, by the Trustee in the name and at the expense of the
Company, and shall be irrevocable. 
  
 SECTION 11.06. Deposit of
Redemption Price. On or prior to any Redemption Date, the Company shall deposit with the Trustee or with a Paying Agent (or, if the Company is acting as its own Paying Agent, segregate and hold in trust as provided in Section 10.03) an amount of
money sufficient to pay the Redemption Price of, and (except if the Redemption Date shall be an Interest Payment Date) accrued interest on, all the Securities which are to be redeemed on that date other than any Securities called for redemption on
that date which have been converted prior to the date of such deposit. 
  
 If any Security called for redemption is converted, any money deposited with the Trustee or with any Paying Agent or so segregated and held in trust for the redemption of such Security shall (subject to any right of the Holder of such
Security or any Predecessor Security to receive interest as provided in the last paragraph of Section 3.07) be paid to the Company upon Company Request or, if then held by the Company, shall be released from such trust. 
  
 SECTION 11.07. Securities Payable on Redemption Date. Notice of redemption
having been given as aforesaid, the Securities so to be redeemed shall, on the Redemption Date, become due and payable at the Redemption Price therein specified, and from and after such date (unless the Company shall default in the payment of the
Redemption Price and accrued interest) such Securities shall cease to bear or accrue any interest. Upon surrender of any such Security for redemption in accordance with said notice, such Security shall be paid by the Company at the Redemption Price,
together with accrued interest to (but not including) the Redemption Date; provided, however, that installments of interest whose Stated Maturity is on or prior to the Redemption Date shall be payable to the Holders of such Securities, or one or
more Predecessor Securities, registered as such at the close of business on the relevant Record Dates according to their terms and the provisions of Section 3.07. 
  

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 If any Security called for redemption shall not be so paid upon surrender thereof for redemption, the
principal (and premium, if any) shall, until paid, bear and accrue interest from the Redemption Date at the rate borne by the Security. 
  
 SECTION 11.08. Securities Redeemed in Part. Any Security which is to be redeemed only in part shall be surrendered at an office or agency of the Company
designated for that purpose pursuant to Section 10.02 (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 his attorney-in-fact 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, of any authorized denomination as
requested by such Holder, in aggregate principal amount equal to and in exchange for the unredeemed portion of the principal amount of the Security so surrendered. 
  
 SECTION 11.09. 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 by an agreement with one or more investment bankers or other purchasers to purchase such Securities by paying to the Trustee in trust for the Holders, on or before the Redemption Date, an
amount not less than the applicable Redemption Price, together with interest accrued to the Redemption Date, of such Securities. Notwithstanding anything to the contrary contained in this Article XI, the obligation of the Company to pay the
Redemption Price of such Securities, together with interest accrued to, but excluding, the date fixed for redemption, 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, a copy of which will be filed with the Trustee prior to the Redemption Date, 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 XIII) surrendered by such purchasers for conversion, all as of immediately prior to the close of business on the Redemption Date
(and the right to convert any such Securities shall be deemed to have been extended through such time), subject to payment of the above amount as aforesaid. At the direction of the Company, the Trustee shall hold and dispose of any such amount paid
to it in the same manner as it would monies 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 to which the Trustee has not consented in writing, 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. Nothing in the preceding
sentence shall be deemed to limit the rights and protections afforded to the Trustee in Article VI hereof, including, but not limited to, the right to indemnification pursuant to Section 6.07. 
  

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 ARTICLE XII 
  
 [INTENTIONALLY OMITTED] 
  
 ARTICLE XIII 
  
 Conversion of Securities 
  
 SECTION 13.01. Conversion Privilege and Conversion Price. Subject to and upon compliance with the provisions of this Article XIII, at the option of the Holder thereof, any Security or any portion of the principal
amount thereof which is U.S.$1,000 or an integral multiple of U.S.$1,000 may be converted at the principal amount thereof, or of such portion thereof, into fully paid and non assessable shares of Common Stock at any time at the Conversion Price,
determined as hereinafter provided, in effect at the time of conversion. Subject to the provisions of the Indenture, the principal amount of all Outstanding Securities shall automatically be converted (“Mandatory Conversion”) into shares
of Common Stock at a Conversion Price of $2.50 per share, subject to any adjustments pursuant to Section 13.04, if the Closing Price of the Common Stock has exceeded 130% of the Conversion Price of $2.50, as such price may be adjusted as described
in Section 13.04, for at least 20 consecutive Trading Days. Unless the Conversion Date for a Mandatory Conversion is set to occur during the period between the close of business on any Regular Record Date next preceding any Interest Payment Date to
the opening of business on such succeeding Interest Payment Date and accrued and unpaid interest is paid as provided in Section 3.07, the Company will pay accrued and unpaid interest to, but not including, the date set by the Company for Mandatory
Conversion on any Securities that are converted on such date. Such conversion rights shall expire at the close of business on the second Business Day immediately preceding October 15, 2010, subject, in the case of conversion of any Global Security,
to any Applicable Procedures. In case a Security or portion thereof is called for redemption at the election of the Company or the Holder thereof exercised his right to require the Company to repurchase the Security, such conversion right in respect
of the Security or portion so called shall expire at the close of business, New York time, on the second Business Day immediately preceding the corresponding Redemption Date or Repurchase Date, as the case may be, unless the Company defaults in
making the payment due upon redemption or repurchase, as the case may be (in each case subject as aforesaid to any Applicable Procedures with respect to any Global Security). In case a Security is subject to Mandatory Conversion, then the right of
the Holder to convert Securities at his option shall expire at the close of business, New York time, on the fifth Business Day immediately preceding the Conversion Date for such Mandatory Conversion. 
  
 The price at which shares of Common Stock shall be delivered upon conversion
at the option of the Holder (herein called the “Conversion Price”) shall be as follows if the Conversion Date occurs during the periods set forth below: 
  

				
	 Period

	  	 Conversion Price
 Per Share


	 Issue Date – April 14, 2006
	  	$	2.12
	 April 15, 2006 – October 14, 2006
	  	$	2.19
	 October 15, 2006 – April 14, 2007
	  	$	2.25
	 April 15, 2007 – October 14, 2007
	  	$	2.32
	 October 15, 2007 – April 14, 2008
	  	$	2.38
	 April 15, 2008 – October 14, 2008
	  	$	2.44
	 October 15, 2008 and thereafter
	  	$	2.50

  

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 The Conversion Price shall be adjusted in certain instances as provided in Section 13.04. 
  
 In case the Company shall, by dividend or otherwise, declare or make a
distribution on its Common Stock referred to in paragraph (4) or (5) of Section 13.04 (including, without limitation, dividends or distributions referred to in the last sentence of paragraph (4) of Section 13.04), the Holder of each Security, upon
the conversion thereof pursuant to this Article XIII subsequent to the close of business on the date fixed for the determination of shareholders entitled to receive such distribution and prior to the effectiveness of the Conversion Price adjustment
in respect of such distribution pursuant to paragraph (4) or (5) of Section 13.04, shall also be entitled to receive for each share of Common Stock into which such Security is converted, the portion of the evidences of indebtedness, shares of
Capital Stock, securities, cash and other property so distributed applicable to one share of Common Stock, provided, however, that, at the election of the Company (whose election shall be evidenced by a Board Resolution) with respect to all Holders
so converting, the Company may, in lieu of distributing to such Holder any portion of such distribution not consisting of cash or securities of the Company, pay such Holder an amount in cash equal to the fair market value thereof (as determined in
good faith by the Board of Directors, whose determination shall be conclusive and described in a Board Resolution). If any conversion of a Security described in the immediately preceding sentence occurs prior to the payment date for a distribution
to holders of Common Stock which the Holder of the Security so converted is entitled to receive in accordance with the immediately preceding sentence, the Company may elect (such election to be evidenced by a Board Resolution) to distribute to such
Holder a due bill for the evidences of indebtedness, shares of Capital Stock, securities, cash or assets to which such Holder is so entitled, provided that such due bill (i) meets any applicable requirements of the principal national securities
exchange or other market on which the Common Stock is then traded and (ii) requires payment or delivery of such evidences of indebtedness, shares of Capital Stock, securities, cash or assets no later than the date of payment or delivery thereof to
holders of Common Stock receiving such distribution. 
  
 SECTION
13.02. Exercise of Conversion Privilege. In order to exercise the conversion privilege, the Holder of any Security to be converted shall surrender such Security, duly endorsed or assigned to the Company or in blank, at any office or agency
maintained by the Company pursuant to Section 10.02, accompanied by written notice (as set forth in Section 2.05 herein) to the Company at such office or agency that the Holder elects to convert such Security or, if less than the entire principal
amount thereof is to be converted, the portion thereof to be converted. 
  

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 Upon the occurrence of a Mandatory Conversion, the Company will give the Trustee and the Holders written
notice of the occurrence of a Mandatory Conversion and the Conversion Date for such Mandatory Conversion as soon as practicable, but no more than five days, following the date on which the conditions to the Mandatory Conversion have been satisfied.
The notice shall state the Conversion Date, which shall be not more than 40 and not less than 20 days after the date of the mailing of such notice, on which date the Securities shall be converted into shares of Common Stock, and shall state that the
Holders may elect to convert their Securities at the Conversion Price then in effect at any time on or before the fifth Business Day prior to such Conversion Date. 
  
 Except as described in the last paragraph of Section 3.07, no Holder of Securities will be entitled upon conversion (other
than Mandatory Conversion) thereof to any payment or adjustment on account of accrued and unpaid interest thereon (although such accrued and unpaid interest will be deemed paid by the appropriate portion of the Common Stock received by the holders
upon such conversion) or on account of dividends on the shares of Common Stock issued in connection therewith. Except as described in the last paragraph of Section 3.07, Securities surrendered for conversion during the period from the close of
business on any Regular Record Date to the opening of business on the corresponding Interest Payment Date (except with respect to Securities called for redemption on a Redemption Date or converted pursuant to a Mandatory Conversion on the Conversion
Date for such Mandatory Conversion, within such period between and including such Regular Record Date and such Interest Payment Date) must be accompanied by payment to the Company in New York Clearing House Funds or other funds acceptable to the
Company of an amount equal to the interest payable on such Interest Payment Date on the principal amount converted. 
  
 Securities shall be deemed to have been converted immediately prior to the close of business on the day of surrender of such Securities for conversion in
accordance with the foregoing provisions, and at such time the rights of the Holders of such Securities as Holders shall cease, and the Person or Persons entitled to receive the Common Stock issuable upon conversion shall be treated for all purposes
as the record holder or holders of such Common Stock at such time. As promptly as practicable on or after the Conversion Date, the Company shall issue and shall deliver at such office or agency a certificate or certificates for the number of full
shares of Common Stock issuable upon conversion, together with payment in lieu of any fraction of a share as provided in Section 13.03. 
  
 In the case of any Security which is converted in part only, upon such conversion the Company shall execute and the Trustee shall authenticate and deliver
to the Holder thereof, at the expense of the Company, a new Security or Securities of authorized denominations in aggregate principal amount equal to the unconverted portion of the principal amount of such Security. Any requirements for notice,
surrender or delivery of Securities pursuant to this Article XIII shall, with respect to any Global Security, be subject to any Applicable Procedures. 
  
 SECTION 13.03. Fractions of Shares. No fractional shares of Common Stock shall be issued upon conversion of Securities. If more than one Security shall be
surrendered for conversion at one time by the same Holder, the number of full shares which shall be issuable upon conversion thereof shall be computed on the basis of the aggregate principal amount of the Securities (or specified portions thereof)
so surrendered. Instead of any fractional 

  

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share of Common Stock which would otherwise be issuable upon conversion of any Security or Securities (or specified portions thereof), the Company shall pay
a cash adjustment in respect of such fraction in an amount equal to the same fraction of the Closing Price per share of the Common Stock at the close of business on the Trading Day immediately prior to the Conversion Date or, alternatively, the
Company shall round the fractional share up to the next higher whole share. 
  
 SECTION 13.04. Adjustment of Conversion Price. 
  
 1. In case the Company shall pay or make a dividend or other distribution on its Common Stock exclusively in Common Stock or shall pay or
make a dividend or other distribution on any other class of Capital Stock of the Company which dividend or distribution includes Common Stock, the Conversion Price in effect at the opening of business on the day next following the date fixed for the
determination of shareholders entitled to receive such dividend or other distribution shall be reduced by multiplying such Conversion Price by a fraction of which the numerator shall be the number of shares of Common Stock outstanding at the close
of business on the date fixed for such determination and the denominator shall be the sum of such number of shares and the total number of shares constituting such dividend or other distribution, such reduction to become effective immediately after
the opening of business on the day next following the date fixed for such determination. For the purposes of this paragraph (1), the number of shares of Common Stock at any time outstanding shall not include shares held in the treasury of the
Company but shall include shares issuable in respect of scrip certificates issued in lieu of fractions of shares of Common Stock. The Company shall not pay any dividend or make any distribution on shares of Common Stock held in the treasury of the
Company. 
  
 2. In case the Company shall pay or
make a dividend or other distribution on its Common Stock consisting exclusively of, or shall otherwise issue to all holders of its Common Stock, rights, warrants or options entitling the holders thereof to subscribe for or purchase shares of Common
Stock at a price per share less than the current market price per share (determined as provided in paragraph (7) of this Section 13.04) of the Common Stock on the date fixed for the determination of shareholders entitled to receive such rights,
warrants or options, the Conversion Price in effect at the opening of business on the day following the date fixed for such determination shall be reduced by multiplying such Conversion Price by a fraction of which the numerator shall be the number
of shares of Common Stock outstanding at the close of business on the date fixed for such determination plus the number of shares of Common Stock which the aggregate of the offering price of the total number of shares of Common Stock so offered for
subscription or purchase would purchase at such current market price and the denominator shall be the number of shares of Common Stock outstanding at the close of business on the date fixed for such determination plus the number of shares of Common
Stock so offered for subscription or purchase, such reduction to become effective immediately after the opening of business on the day following the date fixed for such determination. For the purposes of this paragraph (2), the number of shares of
Common Stock at any time outstanding shall not include shares held in the treasury of the Company but shall include shares issuable in respect of scrip certificates issued in lieu of fractions of shares of Common Stock. The Company shall not issue
any rights, warrants or options in respect of shares of Common Stock held in the treasury of the Company. 
  

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 3. In case outstanding shares of Common Stock shall be subdivided into a greater number
of shares of Common Stock, the Conversion Price in effect at the opening of business on the day following the day upon which such subdivision becomes effective shall be proportionately reduced, and, conversely, in case outstanding shares of Common
Stock shall each be combined into a smaller number of shares of Common Stock, the Conversion Price in effect at the opening of business on the day following the day upon which such combination becomes effective shall be proportionately increased,
such reduction or increase, as the case may be, to become effective immediately after the opening of business on the day following the day upon which such subdivision or combination becomes effective. 
  
 4. Subject to the last sentence of this paragraph (4), in
case the Company shall, by dividend or otherwise, distribute to all holders of Common Stock evidences of indebtedness of the Company or its Subsidiaries, shares of any class of Capital Stock, securities, cash or property (excluding any rights,
warrants or options referred to in paragraph (2) of this Section 13.04, any dividend or distribution paid exclusively in cash and any dividend or distribution referred to in paragraph (1) of this Section 13.04), the Conversion Price shall be reduced
so that the same shall equal the price determined by multiplying the Conversion Price in effect immediately prior to the effectiveness of the Conversion Price reduction contemplated by this paragraph (4) by a fraction of which the numerator shall be
the current market price per share (determined as provided in paragraph (7) of this Section) of the Common Stock on the date of such effectiveness less the fair market value (as determined in good faith by the Board of Directors, whose determination
shall be conclusive and described in a Board Resolution and shall, in the case of securities being distributed for which prior thereto there is an actual or when issued trading market, be no less than the value determined by reference to the average
of the closing prices in such market over the period specified in the succeeding sentence), on the date of such effectiveness, of the portion of the evidences of indebtedness, shares of Capital Stock, securities, cash and property so distributed
applicable to one share of Common Stock and the denominator shall be such current market price per share of the Common Stock, such reduction to become effective immediately prior to the opening of business on the day next following the later of (a)
the date fixed for the payment of such distribution and (b) the date 20 days after the notice relating to such distribution is given pursuant to Section 13.06(a) (such later date of (a) and (b) being referred to as the “Reference Date”).
If the Board of Directors determines the fair market value of any distribution for purposes of this paragraph (4) by reference to the actual or when issued trading market for any securities comprising such distribution, it must in doing so consider
the prices in such market over the same period used in computing the current market price per share pursuant to paragraph (7) of this Section. For purposes of this paragraph (4), any dividend or distribution that includes shares of Common Stock or
rights, warrants or options to subscribe for or purchase shares of Common Stock shall be deemed instead to be (a) a dividend or distribution of the evidences of indebtedness, cash, property, shares of Capital Stock or securities other than such
shares of Common Stock or such rights, warrants or options (making any Conversion Price reduction required by 

  

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this paragraph (4)) immediately followed by (b) a dividend or distribution of such shares of Common Stock or such rights, warrants or options (making any
further Conversion Price reduction required by paragraph (1) or (2) of this Section 13.04, except (i) the Reference Date of such dividend or distribution as defined in this paragraph (4) shall be substituted as “the date fixed for the
determination of shareholders entitled to receive such dividend or other distributions”, “the date fixed for the determination of shareholders entitled to receive such rights, warrants or options” and “the date fixed for such
determination” within the meaning of paragraphs (1) and (2) of this Section 13.04 and (ii) any shares of Common Stock included in such dividend or distribution shall not be deemed “outstanding at the close of business on the date fixed for
such determination” within the meaning of paragraph (1) of this Section 13.04). 
  
 5. In case the Company shall, by dividend or otherwise, make a distribution to all holders of its Common Stock exclusively in cash in an
aggregate amount that, together with (i) the aggregate amount of any other distributions to all holders of its Common Stock made exclusively in cash within the 12 months preceding the date of payment of such distribution and in respect of which no
Conversion Price adjustment pursuant to this paragraph (5) has been made and (ii) the aggregate of any cash plus the fair market value (as determined in good faith by the Board of Directors, whose determination shall be conclusive and described in a
Board Resolution), as of the expiration of the tender or exchange offer referred to below, of consideration payable in respect of any tender or exchange offer by the Company or a Subsidiary for all or any portion of the Common Stock concluded within
the 12 months preceding the date of payment of such distribution and in respect of which no Conversion Price adjustment pursuant to paragraph (6) of this Section 13.04 has been made, exceeds 12.5% of the product of the current market price per share
(determined as provided in paragraph (7) of this Section 13.04) of the Common Stock on the date fixed for shareholders entitled to receive such distribution times the number of shares of Common Stock outstanding on such date, the Conversion Price
shall be reduced so that the same shall equal the price determined by multiplying the Conversion Price in effect immediately prior to the effectiveness of the Conversion Price reduction contemplated by this paragraph (5) by a fraction of which the
numerator shall be the current market price per share (determined as provided in paragraph (7) of this Section 13.04) of the Common Stock on the day immediately preceding the day of the effectiveness of such Conversion Price reduction less the
amount of cash so distributed applicable to one share of Common Stock and the denominator shall be such current market price per share of the Common Stock, such reduction to become effective immediately prior to the opening of business on the later
of (a) the day following the date fixed for the payment of such distribution and (b) the date 20 days after the notice relating to such distribution is given pursuant to Section 13.06(a). 
  
 6. In case a successful tender or exchange offer made by the
Company or any Subsidiary for all or any portion of the Common Stock shall involve an aggregate consideration having a fair market value (as determined in good faith by the Board of Directors, whose determination shall be conclusive and described in
a Board Resolution) at the last time (the “Expiration Time”) tenders or exchanges may be made pursuant to such tender or exchange offer (as it may be amended) that, together with (i) the aggregate of the cash plus the fair market value (as
determined in good faith by the Board of 

  

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Directors, whose determination shall be conclusive and described in a Board Resolution), as of the expiration of the other tender or exchange offer referred
to below, of consideration payable in respect of any other tender or exchange offer by the Company or a Subsidiary for all or any portion of the Common Stock concluded within the preceding 12 months and in respect of which no Conversion Price
adjustment pursuant to this paragraph (6) has been made and (ii) the aggregate amount of any distributions to all holders of the Common Stock made exclusively in cash within the preceding 12 months and in respect of which no Conversion Price
adjustment pursuant to paragraph (5) of this Section 13.04 has been made, exceeds 12.5% of the product of the current market price per share (determined as provided in paragraph (7) of this Section 13.04) of the Common Stock on the Expiration Time
times the number of shares of Common Stock outstanding (including any tendered shares) on the Expiration Time, the Conversion Price shall be reduced (but not increased) so that the same shall equal the price determined by multiplying the Conversion
Price in effect immediately prior to the Expiration Time by a fraction of which the numerator shall be (i) the product of the current market price per share (determined as provided in paragraph (7) of this Section 13.04) of the Common Stock at the
Expiration Time times the number of shares of Common Stock outstanding (including any tendered or exchanged shares) at the Expiration Time minus (ii) the fair market value (determined as aforesaid) of the aggregate consideration payable to
shareholders based on the acceptance (up to any maximum specified in the terms of the tender or exchange offer) of all shares validly tendered or exchanged and not withdrawn as of the Expiration Time (the shares deemed so accepted, up to any such
maximum, being referred to as the “Purchased Shares”) and the denominator shall be the product of (i) such current market price per share at the Expiration Time times (ii) such number of outstanding shares at the Expiration Time less the
number of Purchased Shares, such reduction to become effective immediately prior to the opening of business on the day following the Expiration Time. 
  
 7. For the purpose of any computation under this paragraph and paragraphs (2), (4) and (5) of this Section 13.04, the current market price
per share of Common Stock on any date in question shall be deemed to be the average of the daily Closing Prices for the 5 consecutive Trading Days selected by the Company commencing not more than 20 Trading Days before, and ending not later than,
the date in question; provided, however, that (i) if the “ex” date (as hereinafter defined) for any event (other than the issuance or distribution requiring such computation) that requires an adjustment to the Conversion Price pursuant to
paragraph (1), (2), (3), (4), (5) or (6) above (“Other Event”) occurs on or after the 20th Trading Day prior to the date in question and prior to the “ex” date for the issuance or distribution requiring such computation (the
“Current Event”), the Closing Price for each Trading Day prior to the “ex” date for such Other Event shall be adjusted by multiplying such Closing Price by the same fraction by which the Conversion Price is so required to be
adjusted as a result of such Other Event, (ii) if the “ex” date for any Other Event occurs after the “ex” date for the Current Event and on or prior to the date in question, the Closing Price for each Trading Day on and after the
“ex” date for such Other Event shall be adjusted by multiplying such Closing Price by the reciprocal of the fraction by which the Conversion Price is so required to be adjusted as a result of such Other Event, (iii) if the “ex”
date for any Other Event occurs on the “ex” date for the Current Event, one of those events shall be deemed for purposes of clauses (i) 

  

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and (ii) of this proviso to have an “ex” date occurring prior to the “ex” date for the other event, and (iv) if the “ex” date
for the Current Event is on or prior to the date in question, after taking into account any adjustment required pursuant to clause (ii) of this proviso, the Closing Price for each Trading Day on or after such “ex” date shall be adjusted by
adding thereto the amount of any cash and the fair market value on the date in question (as determined in good faith by the Board of Directors in a manner consistent with any determination of such value for purposes of paragraph (4) or (5) of this
Section 13.04, whose determination shall be conclusive and described in a Board Resolution) of the portion of the rights, warrants, options, evidences of indebtedness, shares of Capital Stock, securities, cash or property being distributed
applicable to one share of Common Stock. For the purpose of any computation under paragraph (6) of this Section 13.04, the current market price per share of Common Stock on any date in question shall be deemed to be the average of the daily Closing
Prices for the 5 consecutive Trading Days selected by the Company commencing on or after the latest (the “Commencement Date”) of (i) the date 20 Trading Days before the date in question, (ii) the date of commencement of the tender or
exchange offer requiring such computation and (iii) the date of the last amendment, if any, of such tender or exchange offer involving a change in the maximum number of shares for which tenders are sought or a change in the consideration offered,
and ending not later than the date of the Expiration Time of such tender or exchange offer (or, if such Expiration Time occurs before the close of trading on a Trading Day, not later than the Trading Day immediately preceding the date of such
Expiration Time); provided, however, that if the “ex” date for any Other Event (other than the tender or exchange offer requiring such computation) occurs on or after the Commencement Date and on or prior to the date of the Expiration Time
for the tender or exchange offer requiring such computation, the Closing Price for each Trading Day prior to the “ex” date for such Other Event shall be adjusted by multiplying such Closing Price by the same fraction by which the
Conversion Price is so required to be adjusted as a result of such other event. For purposes of this paragraph, the term “ex” date, (i) when used with respect to any issuance or distribution, means the first date on which the Common Stock
trades regular way on the relevant exchange or in the relevant market from which the Closing Price was obtained without the right to receive such issuance or distribution, (ii) when used with respect to any subdivision or combination of shares of
Common Stock, means the first date on which the Common Stock trades regular way on such exchange or in such market after the time at which such subdivision or combination becomes effective, and (iii) when used with respect to any tender or exchange
offer means the first date on which the Common Stock trades regular way on such exchange or in such market after the Expiration Time of such tender or exchange offer. 
  
 8. The Company may make such reductions in the Conversion Price, in addition to those required by paragraphs
(1), (2), (3), (4), (5) and (6) of this Section, as the Board of Directors considers to be advisable in order that any event treated for Federal income tax purposes as a dividend of stock or stock rights shall not be taxable to the recipients.

  
 9. No adjustment in the Conversion Price
shall be required unless such adjustment would require an increase or decrease of at least 1% in the Conversion Price; provided, however, that any adjustments which by reason of this paragraph (9) are not required to be made shall be carried forward
and taken into account in any subsequent adjustment. 
  

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 10. In the event that the Company distributes rights or warrants (other than those
referred to in paragraph (2) above) pro rata to holders of Common Stock, so long as any such rights or warrants have not expired or been redeemed by the Company, the Company shall make proper provision so that the Holder of any Security surrendered
for conversion will be entitled to receive upon such conversion, in addition to the Conversion Shares, a number of rights and warrants to be determined as follows: (i) if such conversion occurs after the record date for and on or prior to the date
for the distribution to the holders of rights or warrants of separate certificates evidencing such rights or warrants (the “Distribution Date”), the same number of rights or warrants to which a holder of a number of shares of Common Stock
equal to the number of Conversion Shares is entitled at the time of such conversion in accordance with the terms and provisions of and applicable to the rights or warrants, and (ii) if such conversion occurs after such Distribution Date, the same
number of rights or warrants to which a holder of the number of shares of Common Stock into which the principal amount of such Security so converted was convertible immediately prior to such Distribution Date would have been entitled on such
Distribution Date in accordance with the terms and provisions of and applicable to the rights or warrants. 
  
 SECTION 13.05. Notice of Adjustments of Conversion Price. Whenever the Conversion Price is adjusted as herein provided: 
  
 (a) the Company shall compute the adjusted Conversion Price
in accordance with Section 13.04 and shall prepare a certificate signed by the Treasurer of the Company setting forth the adjusted Conversion Price and showing in reasonable detail the facts upon which such adjustment is based, and such certificate
shall forthwith be filed (with a copy to the Trustee) at each office or agency maintained for the purpose of conversion of Securities pursuant to Section 10.02; and 
  
 (b) a notice stating that the Conversion Price has been adjusted and setting forth the adjusted Conversion
Price shall forthwith be required, and as soon as practicable after it is required, such notice shall be mailed by the Company to all Holders at their last addresses as they shall appear in the Security Register. 
  
 SECTION 13.06. Notice of Certain Corporate Action. In case: 
  
 (a) the Company shall declare a dividend (or any other
distribution) on its Common Stock payable (i) otherwise than exclusively in cash or (ii) exclusively in cash in an amount that would require a Conversion Price adjustment pursuant to paragraph (5) of Section 13.04; or 
  
 (b) the Company shall authorize the granting to the holders
of its Common Stock of rights, warrants or options to subscribe for or purchase any shares of Capital Stock of any class or of any other rights (excluding employee stock options); or 
  
 (c) of any reclassification of the Common Stock (other than a subdivision or combination of its outstanding
shares of Common Stock), or of any consolidation or 

  

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merger to which the Company is a party and for which approval of any shareholders of the Company is required, or of the sale or transfer of all or
substantially all of the assets of the Company; or 
  
 (d) of the voluntary or involuntary dissolution, liquidation or winding up of the Company; or 
  
 (e) the Company or any Subsidiary of the Company shall commence a tender or exchange offer for all or a portion of the Company’s
outstanding shares of Common Stock (or shall amend any such tender or exchange offer); 
  
 then the Company shall cause to be filed at each office or agency maintained for the purpose of conversion of Securities pursuant to Section 10.02, and shall cause to be mailed to all Holders at their last addresses
as they shall appear in the Security Register, at least 20 days (or 10 days in any case specified in clause (a) or (b) above) prior to the applicable record, effective or expiration date hereinafter specified, a notice stating (x) the date on which
a record is to be taken for the purpose of such dividend, distribution or granting of rights, warrants or options, or, if a record is not to be taken, the date as of which the holders of Common Stock of record to be entitled to such dividend,
distribution, rights, warrants or options are to be determined, or (y) the date on which such reclassification, consolidation, merger, sale, transfer, dissolution, liquidation or winding up is expected to become effective, and the date as of which
it is expected that holders of Common Stock of record shall be entitled to exchange their shares of Common Stock for securities, cash or other property deliverable upon such reclassification. consolidation, merger, safe, transfer, dissolution,
liquidation or winding up, or (z) the date on which such tender offer commenced, the date on which such tender offer is scheduled to expire unless extended, the consideration offered and the other material terms thereof (or the material terms of any
amendment thereto). 
  
 SECTION 13.07. Company to Reserve Common
Stock. The Company shall at all times reserve and keep available, free from preemptive rights, out of its authorized but unissued Common Stock, solely for the purpose of effecting the conversion of Securities, the whole number of shares of Common
Stock then issuable upon the conversion in full of all outstanding Securities. 
  
 SECTION 13.08. Taxes on Conversions. The Company will pay any and all taxes that may be payable in respect of the issue or delivery of shares of Common Stock on conversion of Securities pursuant hereto. The Company
shall not, however, be required to pay any tax which may be payable in respect of any transfer involved in the issue and delivery of shares of Common Stock in a name other than that of the Holder of the Security or Securities to be converted, and no
such issue or delivery shall be made unless and until the Person requesting such issue has paid to the Company the amount of any such tax, or has established to the satisfaction of the Company that such tax has been paid. 
  
 SECTION 13.09. Covenant as to Common Stock. The Company covenants that all
shares of Common Stock which may be issued upon conversion of Securities will upon issue be newly issued (and not treasury shares) and be duly authorized, validly issued, fully paid and nonassessable and, except as provided in Section 13.08, the
Company will pay all taxes, liens and charges with respect to the issue thereof. 
  

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 SECTION 13.10. Cancellation of Converted Securities. All Securities delivered for conversion shall be
delivered to the Trustee to be cancelled by or at the direction of the Trustee, which shall dispose of the same as provided in Section 3.09. 
  
 SECTION 13.11. Provisions in Case of Reclassification, Consolidation, Merger or Sale of Assets. In the event that the Company shall be a party to any
transaction (including without limitation any (i) recapitalization or reclassification of the Common Stock (other than a change in par value, or from par value to no par value, or from no par value to par value, or as a result of a subdivision or
combination of the Common Stock), (ii) any consolidation of the Company with, or merger of the Company into, any other Person, any merger of another Person into the Company (other than a merger which does not result in a reclassification,
conversion, exchange or cancellation of outstanding shares of Common Stock), (iii) any sale or transfer of all or substantially all of the assets of the Company, or (iv) any other transaction) pursuant to which the Common Stock is converted into the
right to receive other securities, cash or other property, then lawful provision shall be made as part of the terms of such transaction whereby the Holder of each Security then outstanding shall have the right thereafter to convert such Security
only into (subject to funds being legally available for such purpose under applicable law at the time of such conversion) the kind and amount of securities, cash and other properly receivable upon such transaction by a holder of the number of shares
of Common Stock into which such Security might have been converted immediately prior to such transaction. The Company or the Person formed by such consolidation or resulting from such merger or which acquired such assets or which acquired the
Company’s shares, as the case may be, shall execute and deliver to the Trustee a supplemental indenture establishing such rights. Such supplemental indenture shall provide for adjustments which, for events subsequent to the effective date of
such supplemental indenture, shall be as nearly equivalent as may be practicable to the adjustments provided for in this Article. The above provisions of this Section 13.11 shall similarly apply to successive transactions of the foregoing type.

  
 ARTICLE XIV 
  
 Right to Require Repurchase 
  
 SECTION 14.01. Right to Require Repurchase. In the event that there shall
occur a Change of Control, then each Holder shall have the right, at such Holder’s option, to require the Company to purchase all or any designated part of such Holder’s Securities on the date (the “Repurchase Date”) fixed by the
Company that is not less than 30 days nor more than 45 days after the date the Company gives notice of the Change of Control as contemplated in Section 14.02(a) at a price (the “Repurchase Price”) equal to 100% of the principal amount
thereof, together with accrued and unpaid interest to, but not including, the Repurchase Date unless such interest is paid as provided by the last sentence of Section 14.02(b). Such right to require the repurchase of Securities shall not continue
after a discharge of the Company from its obligations with respect to the Securities in accordance with Article IV or defeasance in accordance with Section 15.01. The Company may, at its option, pay the Repurchase Price in cash or in shares of
Common Stock or the common stock or other securities of any successor Person as provided by Section 13.04. If the Company elects to pay the Repurchase Price in shares of Common Stock, then the shares of Common Stock shall be valued at the average of
the Closing Price of the Common Stock for each of the fifteen (15) Trading Days immediately 

  

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preceding the second Trading Day before the date of the notice of the Change of Control. Any fractional shares that would otherwise be issuable as a result
of an election to pay the Repurchase Price in shares of Common Stock will be payable as provided in Section 13.03. Any requirements for notice, surrender or delivery of Securities pursuant to this Article XIV shall, with respect to any Global
Security, be subject to any Applicable Procedures. 
  
 SECTION
14.02. Notice, Method of Exercising Repurchase Right. 
  
 (a) On or before the 30th day following a Change of Control, the Company, or at the written request of the Company, the Trustee (in the name and at the expense of the Company), shall give notice of the occurrence of the Change of Control
and of the repurchase right set forth herein arising as a result thereof by first-class mail, postage prepaid, or by telefacsimile with written acknowledgement of transmittal to each Holder of the Securities at such Holder’s address appearing
in the Security Register. The Company shall also deliver a copy of such notice of a repurchase right to the Trustee. 
  
 Each notice of a repurchase right shall state: 
  
 1. the Repurchase Date, 
  
 2. the date by which the repurchase right must be exercised; provided, however, that the offer to repurchase the Securities shall remain
open for at least 20 Business Days and not more than 30 Business Days, 
  
 3. the Repurchase Price, 
  
 4. form of payment (cash, Common Stock or a security of the successor Person) of the Repurchase Price and, if applicable, the valuation of such Common Stock (or such other security); and 
  
 5. the instructions a Holder must follow to exercise its
repurchase right. 
  
 No failure of the Company to give the
foregoing notice shall limit any Holder’s right to exercise a repurchase right. The Trustee shall have no affirmative obligation to determine if there shall have occurred a Change of Control. 
  
 (b) To exercise a repurchase right, a Holder shall deliver
to the Company (or an agent designated by the Company for such purpose in the notice referred to in (a) above) and to the Trustee on or before the date by which the repurchase right must be exercised as specified in the repurchase notice (i) written
notice of the Holder’s exercise of such right, which notice shall set forth the name of the Holder, the principal amount of the Security or Securities (or portion of a Security) to be repurchased, and a statement that an election to exercise
the repurchase right is being made thereby, and (ii) the Security or Securities with respect to which the repurchase right is being exercised, duly endorsed for transfer to the Company. Such written notice shall be irrevocable. If the Repurchase
Date falls on or after any Regular Record Date and on or before the opening of business on the corresponding succeeding Interest Payment Date, the Company will pay any accrued and unpaid interest due on such Interest Payment Date to the Person in
whose name the Securities are registered on such Regular Record Date in lieu of paying accrued and unpaid interest to the Repurchase Date on the Securities being repurchased. 
  

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 (c) In the event a repurchase right shall be exercised in accordance with the terms
hereof, the Company shall on the Repurchase Date pay or cause to be paid in cash, or deposit or cause to be deposited shares of Common Stock or other securities if so specified in the repurchase notice, to the Holder thereof the Repurchase Price of
the Security or Securities as to which the repurchase right had been exercised and shall deliver to the Trustee the Securities accepted together with an Officers’ Certificate setting forth the Securities or portions thereof being repurchased.

  
 SECTION 14.03. Deposit of Repurchase Price. On or prior to the
Repurchase Date, the Company shall deposit with the Trustee or with a Paying Agent (or, if the Company is acting as its own Paying Agent, segregate and hold in trust as provided in Section 10.03) an amount of money, shares of Common Stock or other
securities, as applicable, sufficient to pay the Repurchase Price of the Securities which are to be repaid on the Repurchase Date. 
  
 SECTION 14.04. Securities Not Repurchased on Repurchase Date. If any Security surrendered for repurchase shall not be so paid on the Repurchase Date, the
principal of such Security shall, until paid, bear interest from the Repurchase Date at a rate borne by such Security. 
  
 SECTION 14.05. Securities Repurchased in Part. Any Security which is to be repurchased only in part shall be surrendered at any office or agency of the
Company designated for that purpose pursuant to Section 10.02 (with, if the Company or the Trustee so requires, due endorsement by, or written instrument of transfer in form satisfactory to the Company and the Trustee duly executed by, the Holder
thereof or his 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 of any authorized denomination as
requested by such Holder, in aggregate principal amount equal to and in exchange for the unrepurchased portion of the principal of the Security so surrendered. 
  

SECTION 14.06. Third Party Offer. Notwithstanding the foregoing, the Company shall not be required pursuant to this Article XIV to make an offer to
repurchase Securities in connection with a Change of Control if (i) a third party provides the notice of Change of Control in the manner, at the times and otherwise in compliance with the requirements set forth in this Section 14.02 and all other
provisions of this Indenture applicable to the Company’s obligation to offer to repurchase Holders’ Securities upon a Change of Control Offer and such third party purchases all Securities validly tendered and not withdrawn or (ii) the
Company effects defeasance or covenant defeasance of the Securities under Article XV of this Indenture prior to the occurrence of such Change of Control or otherwise discharges this Indenture under Article IV. 
  
 SECTION 14.07. Certain Definitions. For purposes of this Article: The term
“Beneficial Owner” or “beneficial owner” shall be determined in accordance with Rules 13d-3 and 13d-5 promulgated by the Commission under the Exchange Act, or any successor provision thereto, except that a Person shall be deemed
to have “beneficial ownership” of all shares that such Person has the right to acquire, whether such right is exercisable immediately or only after the passage of time. 
  

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 ARTICLE XV 
  
 Defeasance and Covenant Defeasance 
  
 SECTION 15.01. Company’s Option to Effect Defeasance or Covenant Defeasance. The Company may at its option by Board Resolution, at any time, elect to
have either Section 15.02 or Section 15.03 applied to the Outstanding Securities upon compliance with the conditions set forth below in this Article XV. 
  
 SECTION 15.02. Defeasance and Discharge. Upon the Company’s exercise of the option provided in Section 15.01 applicable to this Section, the Company
shall be deemed to have been discharged from their obligations with respect to the Outstanding Securities (other than those specified below) and the Holders on the date the conditions set forth below are satisfied (hereinafter,
“defeasance”). For this purpose, such defeasance means that the Company shall be deemed to have paid and discharged the entire indebtedness represented by the Outstanding Securities, the Company shall be deemed to have satisfied all their
other obligations under such Securities and this Indenture insofar as such Securities are concerned (and the Trustee, at the expense of the Company, shall execute proper instruments acknowledging the same), except for the following which shall
survive until otherwise terminated or discharged hereunder: (A) the rights of Holders of such Securities to receive, solely from the trust fund described in Section 15.04 and as more fully set forth in such Section, payments in respect of the
principal of, premium, if any, and interest on such Securities when such payments are due, (B) the Company’s obligations with respect to such Securities under Sections 3.04, 3.05, 3.06, 10.02, 10.03, Article XIII and Article XIV, (C) the
rights, powers, trusts, duties and immunities of the Trustee hereunder and (D) this Article XV. Subject to compliance with this Article XV, the Company may exercise its option under this Section 15.02 notwithstanding the prior exercise of its option
under Section 15.03. 
  
 SECTION 15.03. Covenant Defeasance. Upon
the Company’s exercise of the option provided in Section 15.01 applicable to this Section, (i) the Company shall be released from its obligations under Sections 10.06, 10.07, 10.11, 10.12 and 10.13 and Article XIV, and (ii) the occurrence of an
event specified in Section 5.01(3), Section 5.01(4) (with respect to either of Sections 10.06, 10.07, 10.11, 10.12 or 10.13 or Article XIV) and 5.01(5) shall not be deemed to be an Event of Default hereof on and after the date the conditions set
forth below are satisfied (hereinafter, “covenant defeasance”). For this purpose, such covenant defeasance means that the Company may omit to comply with and shall have no liability in respect of any term, condition or limitation set forth
in any such Section or Article, whether directly or indirectly by reason of any reference elsewhere herein to any such Section or Article or by reason of any reference in any such Section or Article to any other provision herein or in any other
document, but the remainder of this Indenture and such Securities shall be unaffected thereby. 
  

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 SECTION 15.04. Conditions to Defeasance or Covenant Defeasance. The following shall be the conditions to
application of either Section 15.02 or Section 15.03 to the then Outstanding Securities: 
  
 1. The Company shall irrevocably have deposited or caused to be deposited with the Trustee (or another trustee satisfying the requirements
of Section 6.09 who shall agree to comply with the provisions of this Article XV applicable to it) as trust funds in trust for the purpose of making the following payments, specifically pledged as security for, and dedicated solely to, the benefit
of the Holders of such Securities, (A) money in an amount, or (B) U.S. Government Obligations which through the scheduled payment of principal and interest in respect thereof in accordance with their terms will provide, not later than one day before
the due date of any payment, money in an amount, or (C) a combination thereof, sufficient, in the written opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the
Trustee, to pay and discharge, and which shall be applied by the Trustee (or other qualifying trustee) to pay and discharge, the principal of, premium, if any, and each installment of interest on the Securities on the Stated Maturity of such
principal or installment of interest in accordance with the terms of this Indenture and of such Securities. For this purpose, “U.S. Government Obligations” means securities that are (x) direct obligations of the United States of America
for the payment of which its full faith and credit is pledged or (y) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America the payment of which is unconditionally guaranteed as
a full faith and credit obligation by the United States of America, which, in either case, are not callable or redeemable at the option of the issuer thereof, and shall also include a depository receipt issued by a bank (as defined in Section
3(a)(2) of the Securities Act of 1933, as amended) as custodian with respect to any such U.S. Government Obligation or a specific payment of principal of or interest on any such U.S. Government Obligation held by such custodian for the account of
the holder of such depository receipt, provided that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depository receipt from any amount received by the custodian in
respect of the U.S. Government Obligation or the specific payment of principal of or interest on the U.S. Government Obligation evidenced by such depository receipt. 
  
 2. In the case of an election under Section 15.02, the Company shall have delivered to the Trustee an
Opinion of Counsel stating that (x) the Company has received from, or there has been published by, the Internal Revenue Service a ruling, or (y) since the date of this Indenture there has been a change in the applicable Federal income tax law, in
either case to the effect that, and based thereon such opinion shall confirm that, the Holders of the Outstanding Securities will not recognize gain or loss for Federal income tax purposes as a result of such deposit, defeasance and discharge and
will be subject to Federal income tax on the same amount, in the same manner and at the same times as would have been the case if such deposit, defeasance and discharge had not occurred. 
  
 3. In the case of an election under Section 15.03, the Company shall have delivered to the Trustee an
Opinion of Counsel to the effect that the Holders of the Outstanding Securities will not recognize gain or loss for Federal income tax purposes as a result of such deposit and covenant defeasance and will be subject to Federal income tax on the same
amount, in the same manner and at the same times as would have been the case if such deposit and covenant defeasance had not occurred. 
  

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 4. The Company shall have delivered to the Trustee an Officer’s Certificate to the
effect that the Securities, if then listed on any securities exchange, will not be delisted as a result of such deposit. 
  
 5. Such defeasance or covenant defeasance shall not cause the Trustee to have a conflicting interest as defined in Section 6.08 and for
purposes of the Trust Indenture Act with respect to any securities of the Company. 
  
 6. At the time of such deposit: (A) no default in the payment of all or a portion of principal of (or premium, if any) or interest on or
other obligations in respect of any Senior Secured Indebtedness shall have occurred and be continuing, and no event of default with respect to any Senior Secured Indebtedness shall have occurred and be continuing and shall have insulted in such
Senior Secured Indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable and (B) no other event with respect to any Senior Secured Indebtedness shall have occurred and be
continuing permitting (after notice or the lapse of time, or both) the holders of such Senior Secured Indebtedness (or a trustee on behalf of the holders thereof) to declare such Senior Secured Indebtedness due and payable prior to the date on which
it would otherwise have become due and payable, or, in the case of either Clause (A) or Clause (B) above, each such default or event of default shall have been cured or waived or shall have ceased to exist. 
  
 7. No Event of Default or event which with notice or lapse
of time or both would become an Event of Default shall have occurred and be continuing on the date of such deposit or, insofar as subsections 5.01(6) and (7) are concerned, at any time during the period ending on the 91st day after the date of such
deposit (it being understood that this condition shall not be deemed satisfied until the expiration of such period). 
  
 8. Such defeasance or covenant defeasance shall not result in a breach or violation of, or constitute a default under, any other agreement
or instrument to which the Company is a party or by which it is bound. 
  
 9. The Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for relating to either the defeasance under Section 15.02
or the covenant defeasance under Section 15.03 (as the case may be) have been complied with. 
  
 10. Such defeasance or covenant defeasance shall not result in the trust arising from such deposit constituting an investment company as
defined in the Investment Company Act of 1940, as amended, or such trust shall be qualified under such act or exempt from regulation thereunder. 
  
 SECTION 15.05. Deposited Money and U.S. Government Obligations to Be Held in Trust; Other Miscellaneous Provisions. Subject to the provisions of the last
paragraph of Section 10.03, all money and U.S. Government Obligations (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee - collectively, for purposes of this Section 15.05, the “Trustee”) pursuant to
Section 15.04 in respect of the Securities shall be held in trust 

  

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and applied by the Trustee, in accordance with the provisions of such Securities and this Indenture, to the payment, either directly or through any Paying
Agent (including the Company acting as its own Paying Agent) as the Trustee may determine, to the Holders of such Securities, of all sums due and to become due thereon in respect of principal, premium, if any, and interest. 
  
 The Company shall pay and indemnify the Trustee against any tax, fee or other
charge imposed on or assessed against the U.S. Government Obligations deposited pursuant to Section 15.04 or the principal and interest received in respect thereof other than any such tax, fee or other charge which by law is for the account of the
Holders of the Outstanding Securities. 
  
 Anything in this
Article XV to the contrary notwithstanding, the Trustee shall deliver or pay to the Company from time to time upon Company Request any money or U.S. Government Obligations held by it as provided in Section l5.04 which, in the opinion of a nationally
recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, are in excess of the amount thereof which would then be required to be deposited to effect an equivalent defeasance or covenant
defeasance. 
  
 SECTION 15.06. Reinstatement. If the Trustee or
the Paying Agent is unable to apply any money in accordance with Section 15.02 or 15.03 by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, then the
Company’s obligations under this Indenture and the Securities shall be revived and reinstated as though no deposit had occurred pursuant to this Article XV until such time as the Trustee or Paying Agent is permitted to apply all such money in
accordance with Section 15.02 or 15.03; provided, however, that if the Company makes any payment of principal of, premium, if any, or interest on any Security following the reinstatement of its obligations, the Company shall be subrogated to the
rights of the Holders of such Securities to receive such payment from the money held by the Trustee or the Paying Agent. 
  
 ARTICLE XVI 
  
 Immunity 
  
 SECTION 16.01. Personal Immunity of Incorporators, Shareholders, Directors and Officers. No recourse for the payment of the principal of or interest on the Securities, and no recourse under or upon any obligation, covenant or agreement
contained in this Indenture or in any indenture supplemental hereto, or in the Securities, or because of any indebtedness evidenced thereby, shall be had against any incorporator, or against any past, present or future shareholder, officer or
director, as such, of the Company or any successor corporation, either directly or through the Company or any successor corporation, under any rule of law, statute or constitutional provision or by the enforcement of any assessment or by any legal
or equitable proceeding or otherwise, all such liability being expressly waived and released by the acceptance of the Securities by the Holders thereof and as part of the consideration for the issue of the Securities. Each and every Holder of the
Securities, by receiving and holding the same, agrees to the provisions of this Section 16.01 and waives and releases any and all such recourse, claim and liability. 
  

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 This instrument may be executed in any number of counterparts, each of which so executed shall be deemed
to be an original, but all such counterparts shall together constitute but one and the same instrument. 
  
 IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written. 
  

			
	SPACEHAB, INCORPORATED
		
	By	 	  


	Name:	 	Brian K. Harrington
	Title:	 	 Chief Financial Officer,
 Senior Vice
President,
 Treasurer & Secretary



  

			
	Attest:	 	 
		
	by	 	  


	Name:	 	 

  

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	 WACHOVIA BANK, NATIONAL ASSOCIATION

		
	 By
	 	  


	 Name:
	 	 
	 Title:
	 	 


  

			
	 Attest:
	 	 
		
	 by
	 	  


	 Name:
	 	 

  

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