Document:

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                                EXHIBIT 10(22)

1999 Independent Share Ownership Plan as Approved on January 18, 1999.

RESOLVED that it would be in the best interest of the Company to, and the Board
hereby does, adopt a policy with regard to ownership of shares of Company stock
by outside members of the Board; and

RESOLVED FURTHER that pursuant to such policy: (i) 1,000 shares of Aztec stock,
or if less, Aztec shares having a market value of $15,000.00, shall be granted
to each new outside board member upon his or her election to the Board, whether
such election is held by the Board during a fiscal year or is held by the
shareholders of the Company at a meeting called for the purpose of electing
directors, (ii) 500 shares of Aztec stock shall be granted to each outside
member of the board after each annual meeting of the shareholders after which he
or she continues to serve on the Board, until each board member has been granted
5,000 shares, inclusive of shares, if any, granted under (i) above, and (iii)
each member of the Board shall be required during his or her tenure on the Board
to hold a number of shares of Aztec stock that is at least equal to one-half the
numbers of shares obtained through the direct stock grants made pursuant to (i)
and (ii) above.

1999 Independent Share Ownership Plan as Amended on September 22, 1999.

RESOLVED that the Company plan with regard to ownership of Company stock by
members of the Board of Directors adopted at a meeting of the Board on January
19, 1999 is hereby amended to provide that (i) no single officer or director may
acquire under the plan more than one percent (1%) of the shares of the Company's
Common Stock outstanding on the date of adoption of that policy; and (ii)
together with all other plans of the Company (other than plans for which
shareholder approval is not required under subsections (1) and (3) of Section
312.03 of the Listed Company Manual of the New York Stock Exchange) the plan
shall not permit the issuance of more than five percent (5%) of the Company's
Common Stock outstanding on the date the policy was adopted.

                                       1<PAGE>

                                EXHIBIT 10 (23)

2000 Advisory Director Share Ownership Plan as Approved on March 28, 2000.

RESOLVED, that Advisory Directors shall receive the same cash retainer and
meeting attendance fees received by active members of the Board of Directors and
shall receive a grant of 500 shares of the common stock of the Company after
each annual meeting of the shareholders after which he continues to serve as an
Advisory Director (the "2000 Advisory Director Share Ownership Plan"); and

RESOLVED FURTHER, that 10,000 shares of the Company's $1.00 par value common
stock shall be reserved for issuance under the 2000 Advisory Director Share
Ownership Plan, registered under the Securities Act of 1933 on Form S-8 and
listed on the New York Stock Exchange; and

RESOLVED FURTHER, that while an Advisory Director shall not be granted any new
stock options for his or her service as an Advisory Director, any unvested stock
options held by an Advisory Director which had been granted to him or her in his
or her previous capacity as an independent Director shall continue to vest
during any period (x) between his or her retirement from the Board (whether by
resignation or by expiration of his or her term of office) within six months of
the date of an annual meeting of the shareholders held on a date on which he or
she would be in excess of seventy years of age and (y) his or her retirement or
termination as an Advisory Director.

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                                                                    EXHIBIT 4.1

                              FORM OF CERTIFICATE

              [Legend if Certificate is a Restricted Certificate]

                             [restrictive legend]

     THIS CERTIFICATE (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT") AND UNDER APPLICABLE STATE SECURITIES
LAWS, AND THIS CERTIFICATE MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN
THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.  EACH
PURCHASER OF THIS CERTIFICATE IS HEREBY NOTIFIED THAT THE SELLER OF THIS
CERTIFICATE MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF
THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

     THE HOLDER OF THIS CERTIFICATE AGREES FOR THE BENEFIT OF SOUTHERN ENERGY
MID-ATLANTIC, LLC (THE "COMPANY") THAT WITHIN THE TIME PERIOD REFERRED TO IN
RULE 144(K) OF THE SECURITIES ACT (A) THIS CERTIFICATE MAY BE OFFERED, RESOLD,
PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) IN THE UNITED STATES TO A PERSON WHOM
THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN
RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF
RULE 144A, (II) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN
ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (III) PURSUANT TO AN
EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144
THEREUNDER (IF AVAILABLE), (IV) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OR (V) IN THE UNITED STATES TO AN INSTITUTIONAL
"ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)(1), (2), (3) OR (7) UNDER THE
SECURITIES ACT), IN EACH OF CASES (I) THROUGH (V) IN ACCORDANCE WITH ANY
APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER
WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS
CERTIFICATE FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

     IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR
AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH TRANSFER
AGENT MAY REASONABLY RE-

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QUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.
[THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE
TERMINATION OF ALL APPLICABLE RESALE RESTRICTIONS]. AS USED HEREIN, THE TERMS
OFFSHORE TRANSACTION", "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN
TO THEM BY REGULATION S UNDER THE SECURITIES ACT.

     [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
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 PERSONS IS WRONGFUL IN AS MUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]*

                         [registration rights legend]

     THE HOLDER OF THIS CERTIFICATE, BY ACCEPTANCE HEREOF, WILL BE DEEMED TO
HAVE AGREED TO BE BOUND BY THE PROVISIONS OF THE  REGISTRATION RIGHTS AGREEMENT
DATED DECEMBER 18, 2000 AMONG THE COMPANY AND THE INITIAL PURCHASERS OF THIS
CERTIFICATE.

__________________
*    This legend to appear on Book-Entry Certificates to be deposited with the
     DTC.

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                         SOUTHERN ENERGY MID-ATLANTIC
                          SERIES A PASS THROUGH TRUST

                              8.625% Pass Through
                             Certificate, Series A
                                    CUSIP:
                                     ISIN:

                    Final Distribution Date:  June 30, 2012

          evidencing a fractional undivided interest in a trust, the
              property of which includes certain notes secured by
         certain property leased to Southern Energy Mid-Atlantic, LLC

Certificate No. ______        $ __________ Initial Fractional Undivided Interest

     THIS CERTIFIES THAT _____________, for value received, is the registered
owner of a $_______________ _______________dollars) Fractional Undivided
Interest in the Southern Energy Mid-Atlantic Series A Pass Through Trust (the
"Pass Through Trust") created pursuant to a Pass Through Trust Agreement dated
as of December 18, 2000 (the "Agreement") between State Street Bank and Trust
Company of Connecticut, National Association, as trustee (the "Pass Through
Trustee") and Southern Energy Mid-Atlantic, LLC, a limited liability company
organized under Delaware law (the "Company"), a summary of certain of the
pertinent provisions of which is set forth below.  The initial Fractional
Undivided Interest evidence hereby may change from time to time in accordance
with the terms of the Agreement, such changes as evidenced by the records of the
Pass Through Trustee, which shall be conclusive absent manifest error.  To the
extent not otherwise defined herein, the capitalized terms used herein have the
meaning assigned to them in the Agreement.  This Certificate is one of the duly
authorized Certificates designated as "8.625% Pass Through Certificates, Series
A" (herein called the "Certificates").  This Certificate is issued under and is
subject to the terms, provisions and conditions of the Agreement, to which
Agreement the Holder of this Certificate by virtue of the acceptance hereof
assents and by which such Holder is bound.  The property of the Pass Through
Trust includes Lessor Notes (the "Trust Property").  Each Lessor Note is secured
by a security interest in and lien over the Undivided Interest subject of the
Lease relating to the Lease Indenture under which such Lessor Note was issued
and certain other related property described in such Lease Indenture, and
liability thereunder is limited to the income and proceeds of such security.

     Subject to and in accordance with the terms of the Agreement, from funds
then available to the Pass Through Trustee, there will be distributed on each
June 30 and December 30 (a "Distribution Date"), commencing on June 30, 2001, to
the person in whose name this Certificate is registered at the close of business
on the day of the month

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which is 15 days preceding the Distribution Date, an amount in respect of the
Scheduled Payments on the Lessor Notes due on such Distribution Date, the
receipt of which has been confirmed by the Pass Through Trustee, equal to the
product of the percentage interest in the Pass Through Trust evidenced by this
Certificate and an amount equal to the sum of such Scheduled Payments. Subject
to and in accordance with the terms of the Agreement, in the event that Special
Payments on the Lessor Notes are received by the Pass Through Trustee, from
funds then available to the Pass Through Trustee, there shall be distributed on
the applicable Special Distribution Date, to the Person in whose name this
certificate is registered at the close of business on the day of the month which
is 15 days preceding the Special Distribution Date, an amount in respect of such
Special Payments on the Lessor Notes, the receipt of which has been confirmed by
the Pass Through Trustee, equal to the product of the percentage interest in the
Pass Through Trust evidenced by this Certificate and an amount equal to the sum
of such Special Payments so received. The Special Distribution Date shall be
determined as provided in the Agreement. If a Distribution Date or Special
Distribution Date is not a Business Day, distribution shall be made on the
immediately following Business Day with the same effect as if made on the date
on which such payment was due. The Pass Through Trustee shall mail notice of
each Special Payment and the Special Distribution Date therefore to the Holders
of the Certificates.

     Distributions on this Certificate will be made by the Pass Through Trustee
by (i) if (A) The Depository Trust Company, a New York corporation ("DTC") or
its nominee is the Certificateholder of record of this Certificate, or (B) a
Certificateholder holds a Certificate or Certificates in an aggregate amount
greater than $10,000,000, or (C) a Certificateholder holds a Certificate or
Certificates in an aggregate amount greater than $1,000,000 and so requests to
the Pass Through Trustee, by wire transfer in immediately available funds to an
account maintained by such Certificateholder with a bank, or (ii) if none of the
above apply, by check mailed to such Certificateholder at the address appearing
in the Register, without the presentation or surrender of this Certificate or
the making of any notation hereon.  Except as otherwise provided in the
Agreement and notwithstanding the above, the final distribution on this
Certificate will be made after notice mailed by the Pass Through Trustee of the
tendency of such distribution and only upon presentation and surrender of this
Certificate at the office or agency of the Pass Through Trustee specified in
such notice.

     Each Person who acquires or accepts this Certificate or an interest herein
will be deemed by such acquisition or acceptance to have represented and
warranted that either (i) no Plan assets have been used to acquire this
Certificate or an interest herein or (ii) the acquisition and holding of this
Certificate or interest herein are either exempt from the prohibited transaction
restrictions of ERISA and the Code pursuant to one or more prohibited
transaction statutory or administrative exemptions or do not constitute a
prohibited transaction under such restrictions of ERISA and the Code.

                                       4
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     The Certificates do not represent a direct obligation of, or an obligation
guaranteed by, or an interest in, the Company or the Pass Through Trustee or any
affiliate of any such Person.  The Certificates are limited in right of payment,
all as more specifically set forth in the Agreement.  All payments or
distributions made to Certificateholders under the Agreement shall be made only
from the Trust Property and only to the extent that the Pass Through Trustee
shall have received sufficient income or proceeds from the Trust Property to
make such payments in accordance with the terms of the Agreement.  Each Holder
of this Certificate, by its acceptance hereof, agrees that it will look solely
to the income and proceeds from the Trust Property to the extent available for
distribution to such Holder as provided in the Agreement.  This Certificate does
not purport to summarize the Agreement and reference is made to the Agreement
for information with respect to the interests, rights, benefits, obligations,
proceeds and duties evidenced hereby.  A copy of the Agreement may be examined
during normal business hours at the principal office of the Pass Through
Trustee, and at such other places, if any, designated by the Pass Through
Trustee, by any Certificateholder upon request.

     The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Certificateholders under the Agreement at any time
by the Company and the Pass Through Trustee with the consent of the Required
Holders.  Any such consent by the Holder of this Certificate shall be conclusive
and binding on such Holder and upon all future Holders of this Certificate and
of any Certificate issued upon the transfer hereof or in exchange hereof or in
lieu hereof whether or not notation of such consent is made upon this
Certificate.  The Agreement also permits the amendment thereof, in certain
limited circumstances, without the consent of the Holders of any of the
Certificates.

     As provided in the Agreement and subject to certain limitations therein set
forth, the transfer of this Certificate is registrable in the Register upon
surrender of this Certificate for registration of transfer at the offices or
agencies maintained by the Pass Through Trustee in its capacity as Registrar, or
by any successor Registrar duly endorsed or accompanied by a written instrument
of transfer in form satisfactory to the Pass Through Trustee and the Registrar
duly executed by the Holder hereof or such Holder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized denominations
evidencing the same aggregate Fractional Undivided Interest in the Pass Through
Trust will be issued to the designated transferee or transferees.

     The Certificates are issuable only as registered Certificates without
coupons in minimum denominations of $100,000 Fractional Undivided Interest and
any integral multiples of $1,000 in excess thereof As provided in the Agreement
and subject to certain limitations therein set forth, Certificates are
exchangeable for new Certificates of authorized denominations evidencing the
same aggregate Fractional Undivided Interest in the Pass Through Trust, as
requested by the Holder surrendering the same.

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     No service charge will be made for any such registration of transfer or
exchange, but the Pass Through Trustee shall require payment of a sum sufficient
to cover any tax or governmental charge payable in connection therewith.

     The Pass Through Trustee, the Company, the Owner Lessors, the Registrar and
any agent of the Pass Through Trustee or the Registrar may treat the person in
whose name this Certificate is registered as the owner hereof for all purposes,
and neither the Pass Through Trustee, the Company, the Owner Lessors, the
Registrar nor any such agent shall be affected by any notice to the contrary.

     The obligations and responsibilities created by the Agreement and the Pass
Through Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to
the Agreement and the disposition of all property held as part of the Trust
Property.

     Unless the certificate of authentication hereon has been executed by the
Pass Through Trustee, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.

     THIS CERTIFICATE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK.

                                       6
<PAGE>

     IN WITNESS WHEREOF, the Pass Through Trustee has caused this Certificate to
be duly executed.

                                   SOUTHERN ENERGY MID-ATLANTIC SERIES A
                                   PASS THROUGH TRUST

                                   By:  STATE STREET BANK AND TRUST
                                        COMPANY OF CONNECTICUT,
                                        NATIONAL ASSOCIATION
                                        as Pass Through Trustee

                                   By:___________________________________
                                        Authorized Officer

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