Document:

EX-10.23

THIRD AMENDMENT TO LOAN AGREEMENT

THIS THIRD AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is entered into as of the 17th day
of March 2009, but effective as of February 15, 2009, by and among PERMIAN LEGEND PETROLEUM, LP, a
Texas limited partnership, whose address 3327 West Wadley Avenue, Suite 3, No. 267, Midland, Texas
79707 (the “Borrower”); PERMIAN LEGEND, LLC, a Texas limited liability company, whose address is
also 3327 West Wadley Avenue, Suite 3, No. 267, Midland, Texas 79707 (“Permian LLC”); LISA P.
HAMILTON, an individual, whose address is 3327 West Wadley Avenue, Suite 3, No. 267, Midland, Texas
79707 (“Hamilton”); RONNIE L. STEINOCHER, also an individual, whose address is 2100 West Wadley
Avenue, No. 21, Midland, Texas 79701 (“Steinocher”); and AMERICAN STATE BANK, a Texas banking
association, whose address is 620 North Grant, Odessa, Texas 79764-4797 (alternatively, the “Bank”
or the “Lender”). Permian LLC, Hamilton, and Steinocher are collectively referred to herein as the
“Guarantors”.

NOTICE IS TAKEN OF THE FOLLOWING:

	A.	 	Borrower, Guarantors, and Lender have previously entered into that certain Loan Agreement,
dated as of August 1, 2008, as modified and amended by that certain First Amendment to Loan
Agreement, dated as of October 15, 2008, and as further modified and amended by that certain
Second Amendment to Loan Agreement dated as of January 2, 2009 (as so amended, the “Existing
Loan Agreement”). The Existing Loan Agreement amended and superseded previously existing loan
agreements by and among the same parties.

	B.	 	The Existing Loan Agreement provides for a term loan in the amount of One Million Six Hundred
and Seventy-Five Thousand and No/100 Dollars ($1,675,000.00) (the “Loan”). The Loan is
evidenced by a Term Note, dated as of August 1, 2008, as modified and amended by that certain
Modification and Amendment of Term Note, dated as of October 15, 2008, and as further modified
and amendment by that certain Second Modification and Amendment of Term Note, dated as of
January 2, 2009, in the original principal amount of One Million Six Hundred and Seventy-Five
Thousand and No/100 Dollars ($1,675,000.00), executed by the Borrower in favor of the Lender
(as so modified, the “Note”). As amended, the Note matures on February 15, 2009 (the
“Maturity Date”). The current principal balance outstanding under the Note is One Million
Thirty-One Thousand Three Hundred Ten and Ninety-Five/100 Dollars ($1,031,310.95)

	C.	 	The Note is collateralized by Deeds of Trust covering oil and gas properties owned by the
Borrower in Haskell, Jones, Nolan, Reagan, Runnels, and Taylor Counties, in the State of Texas
(as modified or amended, collectively, the “Deeds of Trust”). In addition, Borrower’s
performance under the Note is collateralized by Guaranty Agreements, under which each
Guarantor agrees to guaranty the Borrower’s indebtedness evidenced by the Note (collectively,
the “Guaranty Agreements”).

	D.	 	The Borrower and Guarantors have now asked the Bank to extend the Maturity Date from February
15, 2009 to May 1, 2009 (the “Extended Maturity Date”). The Bank has agreed to this extension,
subject to the satisfaction of the terms and conditions stated in this Amendment.

	E.	 	The Borrower, the Guarantors, and the Lender have agreed to execute this Amendment in order
to recognize the extension of the Maturity Date to the Extended Maturity Date.

NOW, THEREFORE, for and in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree to amend the terms of the Existing Loan Agreement as follows:

	1.	 	Definitions.

Unless otherwise specifically defined herein, all defined terms used in this Amendment shall
have their respective meanings set forth in the Existing Loan Agreement.

2. Amendments.

	 	 	 	 	 
	A.
	 	The definition of “Maturity Dates” found in the Existing Loan Agreement is

	 	hereby amended to refer to the Extended Maturity

Date.
	B.
	 	The term “Structure” is hereby amended by deleting it in its entirety and

	 	substituting the following:
	 	 	Structure

	 	

	 	 	 

	 	

The principal balance of this Note shall be payable in monthly installments of
outstanding principal and interest in the amount of Eighteen Thousand and No/100
Dollars ($18,000.00) each, all of which will be due and payable on or before the
first day of each and every month until all sums called for hereunder have been paid
in full, beginning on March 1, 2009, said installments to be made until the final
date of maturity, May 1, 2009, at which point all of the outstanding principal and
accrued interest will be due and payable in full.

3. Effectiveness.

	 	A.	 	Except to the extent specifically amended and supplemented hereby, all of the
terms, conditions and provisions of the Existing Loan Agreement shall remain
unmodified, and the Existing Loan Agreement, as amended and supplemented by this
Amendment, is ratified and confirmed as being in full force and effect.

	 	B.	 	All references to the Existing Loan Agreement herein or in any other document
or instrument among Borrower, Guarantors, and Lender shall hereafter be construed to be
references to the Existing Loan Agreement, as modified by this Amendment (as so
modified, the “Loan Agreement”).

	 	C.	 	Borrower and Guarantors expressly acknowledge and agree that until such time as
they have tendered full and final payment of all fees and expenses (including
attorneys’ fees) incurred by the Bank down to the date of this Amendment, the extension
granted by the Bank under this Amendment shall be invalid and of no force and effect.

	4.	 	Guarantors. To evidence their continuing guaranty of the Borrower’s obligation under
the Loan, Guarantors have executed this Amendment.

	5.	 	Counterparts: This Amendment may be executed in any number of counterparts, each of
which when executed and delivered shall be deemed an original, but all of which constitute one
instrument. In making proof of this Amendment, it shall not be necessary to produce or
account for more than one counterpart thereof signed by each of the parties hereto.

	6.	 	Notice of Final Agreement:

THIS WRITTEN AGREEMENT AND ANY OTHER INSTRUMENTS EXECUTED BY THE PARTIES
CONTEMPORANEOUSLY HEREWITH REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.

{The remainder of this page is intentionally left blank. Signature page follows.}

1

IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date and year
first above written.

BORROWER:

PERMIAN LEGEND PETROLEUM LP,

A Texas Limited Partnership

	 	 	 
	By:
	 	Permian Legend, LLC

General Partner

	By:
	 	     /s/ Lisa P. Hamilton—

	 	 	 

	 	 	Lisa P. Hamilton

Manager

	By:
	 	_/s/ Ronnie L. Steinocher—

	 	 	 

	 	 	Ronnie L. Steinocher

Manager

	GUARANTORS:
	 
	By:
	 	Permian Legend, LLC

General Partner

	By:
	 	_/s/ Lisa P. Hamilton—

	 	 	 

	 	 	Lisa P. Hamilton

Manager

	By:
	 	/s/ Ronnie L. Steinocher—

	 	 	 

	 	 	Ronnie L. Steinocher

Manager

      /s/ Lisa P. Hamilton—

Lisa P. Hamilton, Individually

      /s/ Ronnie L. Steinocher—

Ronnie L. Steinocher, Individually

LENDER:

AMERICAN STATE BANK

By:       /s/ Mike Marshall—

Mike Marshall

Executive Vice President

2EX-10.24

FOURTH AMENDMENT TO LOAN AGREEMENT

THIS FOURTH AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is entered into as of the
15th day of May 2009, to be effective for all purposes as of May 1, 2009 (the
“Effective Date”), by and among PERMIAN LEGEND PETROLEUM, LP, a Texas limited partnership, whose
address 3327 West Wadley Avenue, Suite 3, No. 267, Midland, Texas 79707 (the “Borrower”); PERMIAN
LEGEND, LLC, a Texas limited liability company, whose address is also 3327 West Wadley Avenue,
Suite 3, No. 267, Midland, Texas 79707 (“Permian LLC”); LISA P. HAMILTON, an individual, whose
address is 3327 West Wadley Avenue, Suite 3, No. 267, Midland, Texas 79707 (“Hamilton”); RONNIE L.
STEINOCHER, also an individual, whose address is 2100 West Wadley Avenue, No. 21, Midland, Texas
79701 (“Steinocher”); and AMERICAN STATE BANK, a Texas banking association, whose address is 620
North Grant, Odessa, Texas 79764-4797 (alternatively “American State”, the “Bank” or the
“Lender”). Permian LLC, Hamilton, and Steinocher are collectively referred to herein as the
“Guarantors”.

NOTICE IS TAKEN OF THE FOLLOWING:

	A.	 	Borrower, Guarantors, and Lender have previously entered into that certain Loan Agreement,
dated as of August 1, 2008, as modified and amended by that certain First Amendment to Loan
Agreement, dated as of October 15, 2008, as further modified and amended by that certain
Second Amendment to Loan Agreement dated as of January 2, 2009, and as further modified and
amended under that certain Third Amendment to Loan Agreement dated March 17, 2009, to be
effective for all purposes as of February 15, 2009 (as so amended, the “Existing Loan
Agreement”). The Existing Loan Agreement amended and superseded previously existing loan
agreements by and among the same parties.

	B.	 	The Existing Loan Agreement provided for a term loan in the amount of One Million Six Hundred
and Seventy-Five Thousand and No/100 Dollars ($1,675,000.00) (the “Loan”). The Loan is
evidenced by a Term Note, dated as of August 1, 2008, in the original principal amount of One
Million Six Hundred and Seventy-Five Thousand and No/100 Dollars ($1,675,000.00), executed by
the Borrower in favor of the Lender, as modified and amended by that certain Modification and
Amendment of Term Note, dated as of October 15, 2008, as further modified and amendment by
that certain Second Modification and Amendment of Term Note, dated as of January 2, 2009, and
as further modified and amended by that certain Third Modification and Amendment of Term Note,
dated as of March 17, 2009, effective as of February 15, 2009 (as so modified, the “Note”).
As amended, the Note matures on May 1, 2009 (the “Existing Maturity Date”). The current
principal balance outstanding under the Note is One Million Four Thousand Seven Hundred
Forty-Six and Sixty-Five/100 Dollars ($1,004,746.65).

	C.	 	The Note is collateralized by Deeds of Trust covering oil and gas properties owned by the
Borrower in Haskell, Jones, Nolan, Reagan, Runnels, and Taylor Counties, in the State of Texas
(as modified or amended, collectively, the “Deeds of Trust”). In addition, Borrower’s
performance under the Note is collateralized by Guaranty Agreements, under one each of which,
each Guarantor agrees to guaranty the Borrower’s indebtedness evidenced by the Note
(collectively, the “Guaranty Agreements”).

	D.	 	The Borrower and the Guarantors have now asked the Bank to extend the Existing Maturity Date
until July 15, 2009 (the “Extended Maturity Date”), and to reduce the payments required by the
Bank until the Extended Maturity Date from those payments of principal and interest currently
due on a monthly basis under the terms of the Note, to payments of interest only, with such
interest to be calculated at a new rate, during the remaining lifetime of the Note, up until
the point of the Extended Maturity Date.

	E.	 	American State has agreed to extend the final maturity date of the Note until the Extended
Maturity. As consideration for the Bank’s agreement to extend and renew the maturity date of
the Note from the Existing Maturity Date until the Extended Maturity Date, the Borrower and
the Guarantors have agreed to tender to the Bank the amount of Ten Thousand and No/100 Dollars
($10,000.00)(the “Extension Fee”), simultaneously with the execution of this Agreement. As
consideration for the Bank’s agreement to accept payments of interest only until the Extended
Maturity Date, the Borrower and the Guarantors have agreed that such interest will be
calculated by the Bank at a higher rate.

	F.	 	The Borrower, the Guarantors, and the Lender have agreed to execute this Amendment in order
to confirm the terms of their agreement.

NOW, THEREFORE, for and in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree to amend the terms of the Existing Loan Agreement as follows:

	1.	 	Definitions.

Unless otherwise specifically defined herein, all defined terms used in this Amendment shall
have their respective meanings set forth in the Existing Loan Agreement.

2. Amendments.

	A.	 	The term “Rate” is hereby amended by deleting it in its entirety and substituting the
following:

Rate

Interest under the Note shall accrue at an annual rate equal to the American State
Bank Base Rate, plus Two Percent (2.0%). For purposes of this Agreement, the
“American State Bank Base Rate” shall mean the rate announced by Bank as its base
lending rate as of the beginning of each Business Day, as hereinafter defined, (and
for holidays or weekends, the American State Bank Base Rate shall be the American
State Bank Base Rate as of the close of business on the most recent Business Day
immediately preceding such weekend or holiday) before all sums payable hereunder
have been paid in full. Without notice to the Borrower or any other person, the
American State Bank Base Rate may change from time to time pursuant to the preceding
sentence. The American State Bank Base Rate is a reference rate and does not
necessarily represent the lowest or best rate actually charged to any customer. The
Bank may make commercial loans or other loans at rates of interest at, above, or
below the American State Bank Base Rate. “Business Day” shall mean any day other
than a Saturday, Sunday or legal holiday for commercial banks under the laws of the
State of Texas.

	B.	 	The term “Structure” is hereby amended by deleting it in its entirety and substituting the
following:

Structure

Maker shall tender the monthly accrued interest payments due under this Note on the
first day of each month, with the next such payment to be due on June 1, 2009, and a
subsequent payment of interest to be due on July 1, 2009. All of the outstanding
principal and accrued, but unpaid, interest due under the terms of the Note shall be
due and payable as of July 15, 2009, being the Extended Maturity Date. Upon the
occurrence of the Extended Maturity Date, all of the outstanding principal and
accrued, but unpaid, interest will be due and payable in full.

	C.	 	The term “Maturity Date” is hereby amended by deleting it in its entirety and substituting
the following:

Maturity Date

As stated, the Extended Maturity Date of the Loan shall now be July 15, 2009. Upon
the occurrence of the Extended Maturity Date, all of the outstanding principal, and
accrued, but unpaid principal, shall be due and paid in full. In no event shall the
Bank be obligated to extend and renew the Loan as of the Extended Maturity Date, and
nothing in this Amendment shall be construed to require the Lender to extend and the
renew the Loan upon the occurrence of the Extended Maturity Date.

D. Section III of the Existing Loan Agreement shall be amended by deleting it in its entirety and
substituting the following section:

III. CONDITIONS PRECEDENT

The provisions of the Existing Loan Agreement, as amended by this Amendment (as so
amended, the “Loan Agreement”) will serve as the proposed terms of the borrowing
arrangement. Prior to any funds being made available, Borrower will execute and
deliver to the Bank, in form and substance satisfactory to the Bank, this Amendment,
a Fourth Modification and Amendment to Term Note (the “Note Modification”), and such
other documentation as the Bank may require (collectively, the “Amended Loan
Documents”). As a condition precedent to the Bank’s execution of this Amendment
and the Note Modification, the Borrower shall tender the Proceeds Payment and the
Extension Fee to the Bank, in collected funds.

3. Effectiveness.

	 	A.	 	Except to the extent specifically amended and supplemented hereby, all of the
terms, conditions and provisions of the Existing Loan Agreement shall remain
unmodified, and the Existing Loan Agreement, as amended and supplemented by this
Amendment, is ratified and confirmed as being in full force and effect.

	 	B.	 	All references to the Existing Loan Agreement herein or in any other document
or instrument among Borrower, Guarantors, and Lender shall hereafter be construed to be
references to the Loan Agreement, as that term is now defined.

	 	C.	 	Borrower and Guarantors expressly acknowledge and agree that until such time as
they have tendered full and final payment of all fees and expenses (including
attorneys’ fees) incurred by the Bank down to the date of this Amendment, the extension
granted by the Bank under this Amendment shall be invalid and of no force and effect.

	4.	 	Guarantors. To evidence their continuing guaranty of the Borrower’s obligation under
the Loan, Guarantors have executed this Amendment.

	5.	 	Counterparts: This Amendment may be executed in any number of counterparts, each of
which when executed and delivered shall be deemed an original, but all of which constitute one
instrument. In making proof of this Amendment, it shall not be necessary to produce or
account for more than one counterpart thereof signed by each of the parties hereto.

	6.	 	Notice of Final Agreement:

THIS AMENDMENT, THE NOTE MODIFICATION, AND ANY OTHER INSTRUMENTS EXECUTED BY THE
PARTIES CONTEMPORANEOUSLY HEREWITH REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES
AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of the date and year
first above written.

BORROWER:

PERMIAN LEGEND PETROLEUM LP,

A Texas Limited Partnership

	 	 	 
	By:
	 	Permian Legend, LLC

General Partner

	By:
	 	_/s/        Lisa P. Hamilton—

	 	 	 

	 	 	Lisa P. Hamilton

Manager

	By:
	 	_/s/       Ronnie L. Steinocher—

	 	 	 

	 	 	Ronnie L. Steinocher

Manager

	GUARANTORS:
	 
	By:
	 	Permian Legend, LLC

General Partner

	By:
	 	_/s/ Lisa P. Hamilton—

	 	 	 

	 	 	Lisa P. Hamilton

Manager

	By:
	 	_/s/ Ronnie L. Steinocher—

	 	 	 

	 	 	Ronnie L. Steinocher

Manager

      /s/ Lisa P. Hamilton—

Lisa P. Hamilton, Individually

      /s/ Ronnie L. Steinocher—

Ronnie L. Steinocher, Individually

LENDER:

AMERICAN STATE BANK

By:       /s/ Mike Marshall—

Mike Marshall

Executive Vice President

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