Document:

Form of 6.200% Note due 2036

 Exhibit 4.14 
 [FACE OF NOTE] 
 THIS SECURITY IS A REGISTERED GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO
AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE
AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO THE 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. 

 THE WESTERN UNION COMPANY 
  

					
	 6.200% Note Due November 17, 2036
	 	CUSIP:	  	[            ]
			
	 No. R-[    ]
	 		  	$[            ]

 The Western Union Company, a Delaware corporation (the “Company”, which term
includes any successor under the Indenture hereinafter referred to), for value received, promises to pay to Cede & Co., or its registered assigns, the principal sum of
[            ] DOLLARS ($[            ]), or such other amount as indicated on the Schedule of Exchanges of Notes attached
hereto, on November 17, 2036. 
 Issue Date: November 17, 2006. 
 Interest Rate: 6.200% per annum. 
 Interest Payment Dates: May 17 and November 17, commencing May 17, 2007. 
 Regular Record Dates: May 2 and
November 2. 
 Reference is hereby made to the further provisions of this Note set forth on the reverse hereof, which shall for all
purposes have the same effect as if set forth at this place. 
 [Signature page follows] 
  

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 IN WITNESS WHEREOF, the Company has caused this Note to be signed manually or by facsimile by its duly
authorized officer. 
  

							
	Date:                         	 	THE WESTERN UNION COMPANY
			
		 	By:	 	  

		 	Name:	 	Raj Agrawal
		 	Title:	 	Senior Vice President & Treasurer

 (Trustee’s Certificate of Authentication) 
 This is one of the Securities authorized to be issued pursuant to the Indenture referred to in this Note. 
  

			
	 WELLS FARGO BANK, NATIONAL
     ASSOCIATION, as Trustee

		
	By:	 	  

		 	Authorized Signatory

 [REVERSE SIDE OF NOTE] 
 THE WESTERN UNION COMPANY 
 6.200% Note Due November 17, 2036 
 1. Definitions. 
 Terms not otherwise
defined herein shall have the meanings ascribed to such terms in the Indenture dated as of November 17, 2006 between the Company and Wells Fargo Bank, National Association, as Trustee (as amended from time to time, the
“Indenture”). 
 “Comparable Treasury Issue” means the United States Treasury security selected by the
Quotation Agent as having a maturity comparable to the remaining term of the Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate notes of
comparable maturity to the remaining term of such Notes. 
 “Comparable Treasury Price” means, with respect to any
redemption date, (i) the average of four Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Trustee obtains fewer than four such
Reference Treasury Dealer Quotations, the average of all such quotations. 
 “Guarantee Obligation” means as to any Person
(the “guaranteeing person”), and without duplication, any obligation of (a) the guaranteeing person or (b) another Person (including, without limitation, any bank under any letter of credit) to induce the creation of which
the guaranteeing person has issued a reimbursement, counterindemnity or similar obligation, in either case guaranteeing the payment or in effect guaranteeing the payment of any Indebtedness (the “primary obligations”) of any other
third Person (the “primary obligor”) in any manner, whether directly or indirectly, including, without limitation, any obligation of the guaranteeing person, whether or not contingent, (i) to purchase any such primary
obligation or any property constituting direct or indirect security therefor, (ii) to advance or supply funds (1) for the purchase or payment of any such primary obligation or (2) to maintain working capital or equity capital of the
primary obligor or otherwise to maintain the net worth or solvency of the primary obligor or (iii) to purchase property, securities or services primarily for the purpose of assuring the owner of any such primary obligation of the ability of the
primary obligor to make payment of such primary obligation; provided, however, that the term Guarantee Obligation shall not include (x) endorsements of instruments for deposit or collection in the ordinary course of business or
(y) any bond or guarantee given by the Company 
  

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 or any Subsidiary on behalf of any Subsidiary solely for the performance of contractual obligations with customers or on
behalf of customers in the ordinary course of business. The amount of any Guarantee Obligation of any guaranteeing person shall be deemed to be the lower of (a) an amount equal to the stated or determinable amount of the primary payment
obligation in respect of which such Guarantee Obligation is made and (b) the maximum amount for which such guaranteeing person may be liable pursuant to the terms of the instrument embodying such Guarantee Obligation, unless such primary
obligation and the maximum amount for which such guaranteeing person may be liable are not stated or determinable, in which case the amount of such Guarantee Obligation shall be such guaranteeing person’s maximum reasonably anticipated
liability in respect thereof as determined by the Company in good faith. 
 “Primary Treasury Dealer” means a primary U.S.
Government securities dealer in New York City. 
 “Quotation Agent” means the Reference Treasury Dealer appointed by the
Company. 
 “Reference Treasury Dealer” means (i) each of Citigroup Global Markets Inc. and Morgan Stanley &
Co. Incorporated (each a Primary Treasury Dealer) and three other Primary Treasury Dealers selected by the Company, and their respective successors; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer,
the Company will substitute therefor another Primary Treasury Dealer, and (ii) any other Primary Treasury Dealer selected by the Company. 
 “Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue
(expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day preceding such redemption date. 
 “Revolving Credit Facility” means the $1.5 billion credit agreement dated as of September 27, 2006, among the Company, the lenders
party thereto and Citibank, N.A., as administrative agent, and any refinancings thereof, as such agreement may be amended, modified, supplemented, extended, renewed, refinanced or replaced or substituted from time to time. 
 “Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of
the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. 
  

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 2. Principal and Interest. 
 The Company promises to pay the principal of this Note on November 17, 2036. 
 The Company promises to pay interest on the principal amount of this Note on each interest payment date, as set forth on the face of this Note, at the
rate of 6.200% per annum. 
 Interest shall be payable semiannually (to the holders of record of this Note at the close of business on
the May 2nd or November 2nd immediately preceding the interest payment date) on each interest payment date, commencing May 17, 2007. 
 Interest on this Note shall accrue from the most recent date to which interest has been paid on this Note or the Note surrendered in exchange for this
Note (or, if there is no existing default in the payment of interest and if this Note is authenticated between a regular record date and the next interest payment date, from such interest payment date) or, if no interest has been paid, from the
Issue Date. Interest shall be computed in the basis of a 360-day year of twelve 30-day months. 
 Interest not paid when due and any interest
on principal, premium or interest not paid when due shall be paid to the Persons that are Holders on a special record date, which shall be the 15th day preceding the date fixed by the Company for the payment of such interest, whether or not such day
is a Business Day. At least 15 days before a special record date, the Company shall send to each Holder and to the Trustee a notice that sets forth the special record date, the payment date and the amount of interest to be paid. 
 3. Indenture. 
 This is one of the
Securities issued under the Indenture. Capitalized terms used herein are used as defined in the Indenture unless otherwise indicated. The terms of this Note includes those stated in or otherwise provided in accordance with the Indenture and those
made part of the Indenture by reference to the Trust Indenture Act. This Note is subject to all such terms, and Holders are referred to the Indenture and the Trust Indenture Act for a statement of all such terms. To the extent permitted by
applicable law, in the event of any inconsistency between the terms of this Note and the terms of the Indenture, the terms of this Note shall control. 
  

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 This Note is a general unsecured obligations of the Company. The Indenture does not limit the original
aggregate principal amount of the Notes, or any additional Securities that may be issued pursuant to the Indenture, and the Notes and all such additional Securities vote together for all purposes as a single class. This Note is guaranteed, if at
all, as set forth below. 
 4. Redemption and Repurchase; Discharge Prior to Redemption or Maturity. 
 At any time and from time to time, the Company may redeem the Notes at its option, in whole or in part, at a redemption price equal to the greater of
(i) 100% of the principal amount of the Notes to be redeemed, and (ii) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of principal and interest thereon (not including any portion of
such payments of interest accrued as of the date of redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate, plus 25 basis points plus, in each case,
accrued interest thereon to the redemption date. 
 There is no sinking fund or mandatory redemption applicable to this Note. 
 If the Company deposits with the Trustee money or U.S. Government Obligations sufficient to pay the then outstanding principal of, premium, if any, and
accrued interest on this Note to redemption or maturity, the Company may in certain circumstances be discharged from the Indenture and the Notes or may be discharged from certain of its obligations under certain provisions of the Indenture.

 5. Covenants. 
 In
addition to the covenants set forth in Article 4 of the Indenture, this Note is subject to the following additional covenant: 
 a.
Limitation on Indebtedness of Restricted Subsidiaries. The Company will not permit any Restricted Subsidiaries, directly or indirectly, to create, incur, assume or suffer to exist any Indebtedness (which for purposes hereof shall include,
without duplication, Guarantee Obligations) unless immediately thereafter the aggregate amount of (x) all Indebtedness of Restricted Subsidiaries (excluding (A) any Guarantee Obligations in respect of Indebtedness under the Revolving
Credit Facility, the Company’s Floating Rate Notes due 2008, 5.400% Notes due 2011, 5.930% Notes due 2016 or the Notes and (B) Indebtedness owed to the Company or a Restricted Subsidiary, including any renewal or replacement of any of the
obligations under clauses (A) or (B)), (y) the aggregate amount of indebtedness secured by Liens permitted under clause (11) of the definition of “Permitted Liens” contained in the Indenture and (z) the discounted
present value of all net rentals payable under leases covered by 
  

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 Section 4.08(a) of the Indenture (and not expressly excluded therefrom) would not exceed the greater of $300 million
or 15% of Consolidated Net Worth; provided, however, that, solely, for the purposes of this covenant, Indebtedness shall not include indebtedness incurred in connection with (a) overdraft or similar facilities related to settlement,
clearing and related activities by a Restricted Subsidiary in the ordinary course of business consistent with past practice, (b) Purchased Receivables Financings, (c) to the extent the same constitutes Indebtedness, obligations in respect
of net capital adjustments and/or earn-out arrangements pursuant to a purchase or acquisition otherwise permitted under the Indenture, (d) obligations under performance bonds, surety bonds and letter of credit obligations to provide security
for worker’s compensation claims or other statutory obligations and obligations in respect of bank overdrafts not more than two days overdue, in each case, incurred in the ordinary course of business, (e) indebtedness owing to insurance
companies to finance insurance premiums incurred in the ordinary course of business and (f) Guarantee Obligations with respect to Indebtedness and other liabilities otherwise permitted under the Indenture; and provided, further, that any
Indebtedness of a Person (i) existing at the time such Person becomes a Restricted Subsidiary or is merged with or into the Company or a Restricted Subsidiary or other entity or (ii) assumed by the Company or a Subsidiary in connection
with the acquisition of all or a portion of the business of such Person, shall not be deemed to be Indebtedness created, incurred, assumed or guaranteed by a Restricted Subsidiary or otherwise deemed to be Indebtedness of a Restricted Subsidiary for
the purposes of this covenant. 
 6. Registered Form; Denominations; Transfer; Exchange. 
 The Notes are in registered form without coupons in denominations of $1,000 principal amount and any multiple of $1,000 in excess thereof. A Holder may
register the transfer or exchange of Notes in accordance with the Indenture. The Trustee may require a Holder to furnish appropriate endorsements and transfer documents and to pay any taxes and fees required by law or permitted by the Indenture.
Pursuant to the Indenture, there shall be certain periods during which the Trustee may not be required to issue, register the transfer of or exchange any Note or certain portions of a Note. 
 7. Defaults and Remedies. 
 If an
Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the outstanding Notes may declare all the Notes to be due and payable. Holders may not enforce the Indenture or the Notes except as provided
in the Indenture. The Trustee may require indemnity satisfactory to it before it enforces the Indenture or the Notes. Subject to certain limitations provided in the Indenture, Holders of a majority in principal amount of the Notes then outstanding
may direct the Trustee in its exercise of remedies. 
  

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 8. Amendment and Waiver. 
 The Indenture and this Note may be amended, or default thereunder may be waived, in accordance with provisions set forth in the Indenture. 
 9. Authentication. 
 This Note is not
valid until the Trustee (or Authenticating Agent) signs the certificate of authentication on the other side of this Note. 
 10. Governing
Law. 
 The laws of the State of New York shall govern this Note, without regard to conflicts of law principles thereof. 
 11. Abbreviations. 
 Customary
abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian) and
U/G/M/A/ (= Uniform Gifts to Minors Act). 
 The Company shall furnish a copy of the Indenture to any Holder upon written request and without
charge. 
  

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 [FORM OF TRANSFER NOTICE] 
 FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and transfer(s) unto 
  

	
	Insert Taxpayer Identification No.
	
	
	  

	
	  

	(Please print or typewrite name and address including zip code of assignee)
	
	The within Note and all rights thereunder, hereby irrevocably constituting and appointing
	
	  

 attorney to transfer said Note on the books of the Company with full power of substitution in the premises.

 Date:
                     
  

					
		 	  

		 	Seller	 	
			
		 	By	 	  

	
	NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within-mentioned instrument in every particular, without alteration or any
change whatsoever.

					
	 Signature
 Guarantee:5
	 	  
  

			
		 	By	 	  

		 	To be executed by an executive officer

	5	Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include
membership or participation in the Securities Transfer Association Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution
for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended. 

 SCHEDULE OF EXCHANGES OF NOTES 
 The following exchanges of a part of this Registered Global Security for other Securities or a part of another Registered Global Security have been made: 
  

									
	 Date of Exchange
	  	 Amount of decrease
 in principal amount
 of this
Registered
 Global Security
	  	 Amount of increase
 in principal amount
 of this
Registered
 Global Security
	  	 Principal amount of
 this Registered
 Global
Security
 following such
 decrease (or
 increase)
	  	 Signature of
 authorized officer of
 TrusteeOmnibus Amendment and Consent

 Exhibit 10.3 
 OMNIBUS AMENDMENT AND CONSENT 
 This Omnibus Amendment and Consent (this “Agreement”) dated
effective as of December 31, 2006 (the “Effective Date”) is among Diamondback Energy Services LLC, a Delaware limited liability company (the “Existing Borrower”), certain subsidiaries of the Existing Borrower (the
“Guarantors”), the lenders party to the Credit Agreement described below (the “Lenders”), and Fortis Capital Corp., as administrative agent for such Lenders (in such capacity, the “Administrative Agent”) and as issuing
bank (in such capacity, the “Issuing Bank”). 
 RECITALS 
 A. Reference is made to the Credit Agreement dated as of August 30, 2006 among the Existing Borrower, the Guarantors, the Lenders, the
Administrative Agent and the Issuing Bank (as it may be amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”). 
 B. Effective as of the Effective Date, the Existing Borrower will transfer to Diamondback Holdings, LLC, a newly formed Delaware limited liability company and wholly-owned Subsidiary of the Existing Borrower (the
“New Borrower”), all of the Equity Interests in each of its Subsidiaries (other than Taylor Rig, L.L.C., an Oklahoma limited liability company, Diamondback-Special LLC, an Oklahoma limited liability company, and Athena Construction,
L.L.C., a Louisiana limited liability company (each a “Released Guarantor” and collectively, the “Released Guarantors”)) in exchange for all of the Equity Interests in the New Borrower and the assumption by the New Borrower of
the Obligations under the Credit Agreement (the “Permitted Transfer and Assumption”). Prior to the IPO Completion Date (as defined in the Credit Agreement), the New Borrower will merge with and into a newly formed wholly-owned Subsidiary,
Diamondback Energy Services, Inc., a Delaware corporation (the “Merger Sub”), with the Merger Sub as the surviving entity (the “Merger”). Upon the consummation of the Merger, Merger Sub will become the ultimate Borrower under the
Credit Agreement in accordance with Section 6.03(a)(iii) of the Credit Agreement. 
 C. The parties hereto wish to enter into
this Agreement to (i) permit the New Borrower to assume the Existing Borrower’s obligations under the Credit Agreement and the other Loan Documents, as the successor to the Existing Borrower, (ii) release the Released Guarantors from
their obligations under Article VIII of the Credit Agreement and the Security Documents and (iii) to amend certain terms and provisions of the Loan Documents as set forth herein. 
 THEREFORE, the Existing Borrower, the Guarantors, the Lenders, the Issuing Bank and the Administrative Agent hereby agree as follows: 
 ARTICLE I. 
 DEFINITIONS

 Section 1.1 Defined Terms. As used in this Agreement, each of the terms defined in the opening paragraph and the
Recitals above shall have the meanings assigned to such terms therein. Each term defined in the Credit Agreement and used herein without definition shall have the meaning assigned to such term in the Credit Agreement, unless expressly provided to
the contrary. 

 Section 1.2 Other Definitional Provisions. The words “hereby”,
“herein”, “hereinafter”, “hereof”, “hereto” and “hereunder” when used in this Agreement shall refer to this Agreement as a whole and not to any particular Article, Section, subsection or provision of
this Agreement. Section, subsection and Exhibit references herein are to such Sections, subsections and Exhibits to this Agreement unless otherwise specified. All titles or headings to Articles, Sections, subsections or other divisions of this
Agreement or the exhibits hereto, if any, are only for the convenience of the parties and shall not be construed to have any effect or meaning with respect to the other content of such Articles, Sections, subsections, other divisions or exhibits,
such other content being controlling as the agreement among the parties hereto. Definitions of terms defined in the singular or plural shall be equally applicable to the plural or singular, as the case may be, unless otherwise indicated. 

ARTICLE II. 
 RELEASE OF CERTAIN
GUARANTORS AND CONSENT 
 Section 2.1 Release of Certain Guarantors 
 (a) Effective as of the Effective Date, the Secured Parties hereby (i) release and discharge each Released Guarantor from all present and future
obligations and liabilities under the Credit Agreement, (ii) release and forever discharge any and all security interests, liens, mortgages, pledges, encumbrances, assignments and all other rights and interests that they may have in any of the
property of any Released Guarantor pursuant to the Security Agreement, the Pledge Agreement or any other Security Document and (iii) grant, assign, deliver and release unto, and cause to re-vest in, each Released Guarantor any and all rights
and interests that they have or may have in any property of such Released Guarantor pursuant to the Security Agreement, the Pledge Agreement or any other Security Document. 
 (b) Notwithstanding the foregoing, the release provided for in this Section shall be a release of the Released Guarantors only, and nothing herein shall
be construed to be a release of any other obligations of any Loan Party under any Loan Document to, or for the benefit of the Administrative Agent or the Secured Parties. Furthermore, nothing herein shall be deemed or construed to in any manner
release, amend, alter, or modify any Loan Document or any right, title, lien, equity, or interest of the Administrative Agent or any Secured Party, insofar as they cover or affect any property or interest other than the property of the Released
Guarantors. 
 Section 2.2 Consent to Permitted Transfer and Assumption. 
 (a) The Administrative Agent and the Lenders hereby consent to the Permitted Transfer and Assumption and agree that the Permitted Transfer and Assumption
shall not constitute a Default or Event of Default under Section 7.01(c) of the Credit Agreement (as a result of a violation of Section 6.04 of the Credit Agreement) or Section 7.01(j) of the Credit Agreement;
provided that, this Section shall not become effective until the conditions precedent in Article IV hereof have been met. 
  

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 (b) The express consent set forth above is limited to the extent described herein and shall not be
construed to be a consent to or a permanent waiver of any terms, provisions, covenants, warranties or agreements contained in the Credit Agreement or in any of the other Loan Documents, unless expressly provided so herein. The Lenders reserve the
right to exercise any rights and remedies available to them in connection with any present or future Defaults with respect to the Credit Agreement or any other provision of any Loan Document. 
 ARTICLE III. 
 AMENDMENTS 
 Section 3.1 Omnibus Amendments. As of the Effective Date, 
 (a) For all purposes under the Loan Documents, the New Borrower shall become the “Borrower” under the Credit Agreement. 
 (b) For all purposes under the Loan Documents, the Released Guarantors shall no longer be (i) “Guarantors” under the Credit Agreement,
(ii) “Grantors” under the Security Agreement or (iii) “Pledgors” under the Pledge Agreement. 
 Section 3.2 Specific Amendments to the Credit Agreement. As of the Effective Date, 
 (a) The definition of
“Borrowing Base” in Section 1.01 of the Credit Agreement is hereby amended by deleting paragraphs (f) and (g) in their entirety. 
 (b) The definition of “Purchased Post-Acquisition Equipment” in Section 1.01 of the Credit Agreement is hereby amended by replacing the phrase “, the Acquired Tangible Assets and
Self-Manufactured Post-Acquisition Equipment” in its entirety with the phrase “and the Acquired Tangible Assets”. 
 (c) The
definition of “Self-Manufactured Post-Acquisition Equipment” in Section 1.01 of the Credit Agreement is hereby deleted in its entirety. 
 (d) Section 6.03(a)(iii) of the Credit Agreement is hereby amended by replacing the phrase “and any necessary conforming amendments to the Loan Documents” in its entirety with the phrase “,
any necessary conforming amendments to the Loan Documents, Security Documents reasonably requested by the Administrative Agent to secure the Obligations, documents of the types referred to in clauses Section 3.01(a)(vii), (viii), (ix) and
(x), favorable opinions of counsel to the Borrower and such other documents, governmental certificates and agreements as the Administrative Agent or any Lender may reasonably request”. 
 (e) Section 6.15(c) of the Credit Agreement is hereby amended by (i) replacing the phrase “Tangible Net Worth as of the Closing
Date” with the phrase “Tangible Net Worth as of December 31, 2006” and (ii) replacing the phrase “ending after the Closing Date” with the phrase “ending after December 31, 2006”. 
 (f) Section 6.15(d) of the Credit Agreement is hereby amended by replacing the phrase “(ii) $12,500,000 for the fiscal quarter ending
December 31, 2006 and (iii)

  

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$15,000,000 for each fiscal quarter ending thereafter” in its entirety with the phrase “(ii) $12,500,000 for the fiscal quarter ending
December 31, 2006, (iii) $12,000,000 for the fiscal quarter ending March 31, 2007 and (iv) $15,000,000 for each fiscal quarter ending thereafter”. 
 (g) Exhibit B to the Credit Agreement is hereby deleted and replaced in its entirety with Exhibit B attached to this Agreement. 

(h) Exhibit C to the Credit Agreement is hereby deleted and replaced in its entirety with Exhibit C attached to this Agreement.

 ARTICLE IV. 
 CONDITIONS PRECEDENT 
 This Agreement shall become effective as of the Effective Date and enforceable against the parties
hereto, and the Credit Agreement and other Loan Documents shall be amended as provided herein upon the occurrence of the following conditions precedent: 
 Section 4.1 Documentation. The Administrative Agent shall have received the following duly executed by all the parties thereto, in form and substance satisfactory to the Administrative Agent, the
Issuing Bank and the Lenders: 
 (a) this Agreement; 
 (b) an assumption agreement among the Existing Borrower, the New Borrower and the Administrative Agent pursuant to which the New Borrower shall assume the Obligations of the Existing Borrower under the Credit
Agreement and the other Loan Documents; 
 (c) a Note executed by the New Borrower payable to the order of each Lender in the amount of its
Revolving Commitment, if requested; 
 (d) any Security Documents reasonably requested by the Administrative Agent to secure the Obligations
together with UCC-1 financing statements and/or UCC-3 financing statement amendments, stock certificates and stock powers executed in blank, if applicable, and any other documents, agreements or instruments necessary to create an Acceptable Security
Interest in the Collateral; 
 (e) documents of the types referred to in clauses Section 3.01(a)(vii), (viii), (ix) and (x) of
the Credit Agreement with respect to the New Borrower; 
 (f) favorable opinions of counsel to the Loan Parties, as the Administrative Agent
may request; 
 (g) a certificate from a Financial Officer of the New Borrower dated as of the Effective Date addressed to the Administrative
Agent and each of the Lenders regarding the matters set forth in Section 4.20 of the Credit Agreement; 
  

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 (h) a copy of, or a certificate as to coverage under, the insurance policies required by
Section 5.04 of the Credit Agreement and the applicable provisions of the Security Documents, each of which shall be endorsed or otherwise amended to include a customary lender’s loss payable endorsement and to name the
Administrative Agent as an additional insured; 
 (i) copies of the Transfer Documents (as defined below) certified by a Responsible Officer
of the New Borrower as being true and correct copies thereof; and 
 (j) such other documents, governmental certificates and agreements as
the Administrative Agent or any Lender may reasonably request. 
 Section 4.2 Transfer Documents. 
 (a) The terms and conditions of the agreements, instruments and documents entered into by the New Borrower, the Existing Borrower and the Guarantors in
connection with the Permitted Transfer and Assumption (the “Transfer Documents”) shall be in form and substance satisfactory to the Administrative Agent and the Lenders. 
 (b) Except as otherwise disclosed in writing and acceptable to the Administrative Agent, the Transfer Documents shall be in full force and effect and no
material term or condition thereof shall have been amended, modified or waived in writing after the execution thereof, unless such amendment, modification or waiver is in form and substance satisfactory to the Administrative Agent. 
 (c) All conditions to the Permitted Transfer and Assumption as set forth in the Transfer Documents shall have been satisfied or waived in form and
substance satisfactory to the Administrative Agent. 
 Section 4.3 Authorizations and Approvals. All necessary
Governmental Authorities and other Persons shall have approved or consented to the Permitted Transfer and Assumption, including, without limitation, those required in connection with the continued operation of the New Borrower and its Subsidiaries,
to the extent required, and such approvals shall be in full force and effect, and all applicable waiting periods shall have expired without any action being taken or threatened that would restrain, prevent or otherwise impose adverse conditions on
this Agreement or any other Loan Document and the actions contemplated hereby and thereby. 
 Section 4.4 No Default. No
Default shall have occurred and be continuing or would result from the Permitted Transfer and Assumption. 
 Section 4.5
Representations and Warranties. The representations and warranties contained in Article IV of the Credit Agreement and in each other Loan Document shall be true and correct before and after giving effect to the Permitted Transfer
and Assumption on and as of the Effective Date, as if made on as and as of such date, other than representations and warranties which relate to a specific date, which shall be correct as of such date. 
  

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 Section 4.6 No Material Adverse Effect. Since December 31, 2005, there has been
no material adverse change in the condition (financial or otherwise), results of operations, assets, properties or business of the Existing Borrower and its Subsidiaries, taken as a whole. 
 Section 4.7 Additional Information. The Administrative Agent shall have received such additional information which the Administrative
Agent shall have reasonably requested, and such information shall be reasonably satisfactory in form and substance to the Administrative Agent and its counsel. 
 ARTICLE V. 
 REPRESENTATIONS AND WARRANTIES 
 Each Loan Party (other than the Released Guarantors) jointly and severally represents and warrants as follows: 
 (a) the representations and warranties contained in Article IV of the Credit Agreement and in each other Loan Document are true and correct on and
as of the Effective Date, as if made on and as of such date, other than representations and warranties which relate to a specific date, which are correct as of such date; and 
 (b) no Default of Event of Default has occurred and is continuing. 
 ARTICLE VI. 
 MISCELLANEOUS 
 Section 6.1 Reaffirmation of Guaranty and Liens. 
 (a) Each Guarantor (other than the Released Guarantors) (i) is party to the Credit Agreement, guaranteeing payment of the Obligations, (ii) has reviewed this Agreement and related documents, and
(iii) waives any defense arising by reason of any disability, lack of corporate authority or power, or other defense of the Existing Borrower, the New Borrower or any other guarantor of the Obligations, and agrees that according to its terms
Article VIII of the Credit Agreement will continue in full force and effect to guaranty the Obligations under the Loan Documents, as the same may be amended, supplemented, or otherwise modified, and such other amounts in accordance with the
terms of the Credit Agreement. 
 (b) Each Loan Party (other than the Released Guarantors) (i) is a party to certain Security Documents
securing and supporting the Obligations, (ii) has reviewed this Agreement and related documents, and (iii) waives any defense arising by reason of any disability, lack of corporate authority or power, or other defense of the Existing
Borrower, the New Borrower or any other guarantor of the Obligations, and agrees that according to their terms the Security Documents to which they are party will continue in full force and effect to secure the Obligations under the Loan Documents,
as the same may be amended, supplemented, or otherwise modified, and (iv) acknowledges, represents, and warrants that the Liens and security interests created by the Security Documents are valid and subsisting and create a first priority
perfected security interest subject to Permitted Liens. 
  

 6 

 (c) The delivery of this Agreement does not indicate or establish a requirement that any Loan Document
requires any Guarantor’s approval of amendments to the Loan Documents, but has been furnished to the Administrative Agent and the Lenders as a courtesy at the Administrative Agent’s request. 
 Section 6.2 Effect on Loan Documents; Acknowledgments. 
 (a) Each Loan Party acknowledges that on the Effective Date all Obligations are and shall be payable without defense, offset, counterclaim or recoupment. 
 (b) The Administrative Agent, the Issuing Bank, and the Lenders hereby expressly reserve all of their rights, remedies, and claims under the Loan
Documents. Except as expressly set forth herein, nothing in this Agreement shall constitute a waiver or relinquishment of (i) any Default or Event of Default under any of the Loan Documents, (ii) any of the agreements, terms or conditions
contained in any of the Loan Documents, (iii) any rights or remedies of the Administrative Agent, the Issuing Bank or any Lender with respect to the Loan Documents, or (iv) the rights of the Administrative Agent, any Issuing Bank or any
Lender to collect the full amounts owing to them under the Loan Documents. 
 (c) Each Loan Party, the Administrative Agent, the Issuing
Bank, and the Lenders does hereby adopt, ratify, and confirm each of the Loan Documents, as amended hereby, and acknowledges and agrees that each of the Loan Documents, as amended hereby, is and remains in full force and effect, and each Loan Party
acknowledges and agrees that its liabilities under the Credit Agreement are not impaired in any respect by this Agreement or the consent granted hereunder. 
 (d) From and after the Effective Date, all references to the Credit Agreement and the Loan Documents shall mean such Credit Agreement and such Loan Documents as amended by this Agreement. This Agreement and each of
the other documents executed in connection herewith is a Loan Document for the purposes of the provisions of the other Loan Documents. Without limiting the foregoing, any breach of representations, warranties, and covenants under this Agreement
shall be a Default or Event of Default, as applicable, under the Credit Agreement. 
 Section 6.3 Counterparts. This
Agreement may be signed in any number of counterparts, each of which shall be an original and all of which, taken together, constitute a single instrument. This Agreement may be executed by facsimile signature and all such signatures shall be
effective as originals. 
 Section 6.4 Successors and Assigns. This Agreement shall be binding upon and inure to the
benefit of the parties hereto and their respective successors and assigns permitted pursuant to the Credit Agreement. 
 Section 6.5
Severability. In the event that any one or more of the provisions contained in this Agreement shall for any reason be held invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect
any other provision of this Agreement. 
  

 7 

 Section 6.6 Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York and the applicable laws of the United States of America. 
 Section 6.7 Entire
Agreement. THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS CONSTITUTE THE ENTIRE UNDERSTANDING AMONG THE PARTIES HERETO WITH RESPECT TO THE SUBJECT MATTER HEREOF AND SUPERSEDE ANY PRIOR AGREEMENTS, WRITTEN OR ORAL, WITH RESPECT
THERETO. 
 THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES. 
 [Signature Pages Follow] 
  

 8 

 EXECUTED as of the date first above written. 
  

			
	EXISTING BORROWER:
	
	DIAMONDBACK ENERGY SERVICES LLC
		
	By:	 	 /s/ Cale M. Coulter

	Name:	 	Cale M. Coulter
	Title:	 	CFO
	
	GUARANTORS:
	
	DIAMONDBACK-QUANTUM LLC
	DIAMONDBACK PUMPING SERVICE LLC
	DIAMONDBACK-PIONEER LLC
	DIAMONDBACK-PST LLC
	DIAMONDBACK-WELL SERVICE LLC
	DIAMONDBACK-TOTAL SERVICES LLC
	DIAMONDBACK-CEMENTING SERVICES LLC
	PACKERS & SERVICE TOOLS, INC.
	SOONER TRUCKING & OILFIELD SERVICES, INC.
	DIAMONDBACK-DISPOSAL LLC
	DIAMONDBACK-TOTAL OKLAHOMA LLC
		
	By:	 	 /s/ Cale M. Coulter

	Name:	 	Cale M. Coulter
	Title:	 	CFO

  

 Omnibus Amendment and Consent 

			
	DIAMONDBACK PUMPING SERVICE, L.P.
		
	By:	 	 Diamondback Pumping GP LLC,
 its general
partner

		
	By:	 	 /s/ Cale M. Coulter

	Name:	 	Cale M. Coulter
	Title:	 	CFO
	
	DIAMONDBACK-TOTAL, L.P.
		
	By:	 	Diamondback-Total Texas LLC, its general partner
		
	By:	 	 /s/ Cale M. Coulter

	Name:	 	Cale M. Coulter
	Title:	 	CFO
	
	DIAMONDBACK-DISPOSAL, L.P.
		
	By:	 	Diamondback-Disposal Texas LLC, its general partner
		
	By:	 	 /s/ Cale M. Coulter

	Name:	 	Cale M. Coulter
	Title:	 	CFO

  

 Omnibus Amendment and Consent 

			
	 FORTIS CAPITAL CORP.,
 as Administrative
Agent, Issuing Bank and Lender

		
	By:	 	 /s/ Svein Engh

	Name:	 	Svein Engh
	Title:	 	Managing Director
		
	By:	 	 /s/ Tobias Backer

	Name:	 	Tobias Backer
	Title:	 	Senior Vice President

  

 Omnibus Amendment and Consent 

 EXHIBIT B 
 FORM OF BORROWING BASE REPORT 
 [For Month Ended
                        ] 
 This certificate dated as of                         ,
         is prepared pursuant to the Credit Agreement dated as of August 30, 2006 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”) among
[Diamondback Holdings, LLC, a Delaware limited liability company][Diamondback Energy Services, Inc., a Delaware corporation]1 (the “Borrower”), certain subsidiaries of the Borrower, as guarantors, the lenders party thereto (the “Lenders”), and Fortis Capital Corp., as administrative agent for such Lenders (in such
capacity, the “Administrative Agent”). Unless otherwise defined in this certificate, capitalized terms that are defined in the Credit Agreement shall have the meanings assigned to them by the Credit Agreement. 
 The Borrower hereby certifies (a) that no Default or Event of Default has occurred or is continuing, (b) that all of the representations and
warranties made by each of the Loan Parties in the Credit Agreement and the other Loan Documents (other than representations and warranties that related to a specific prior date) are true and correct in all material respects as if made on this date,
and (c) that as of the date hereof, the following amounts and calculations were true and correct: 
  

									
	A.	  	Eligible Accounts Receivable	 	
				
		  	1.	  	Accounts of the Loan Parties	 	$                
				
		  	2.	  	minus:	 	
					
		  		  	(i)	 	Accounts that are not valid, bona fide accounts receivable and contract receivables	 	$                
					
		  		  	(ii)	 	Accounts with respect to which the Administrative Agent does not have an Acceptable Security Interest	 	$                
					
		  		  	(iii)	 	Accounts that are unpaid more than ninety (90) days after the date of issuance of the respective invoice	 	$                
					
		  		  	(iv)	 	Accounts owed by a single Account Debtor and its Affiliates as of any date of determination which exceed twenty percent (20%) of all Eligible Accounts Receivable;	 	$                
					
		  		  	(v)	 	Accounts that are owed a credit, discount, allowance or other similar adjustment by any Loan Party (but only to the extent of such credit, discount, allowance or other similar
adjustment)	 	$                

  

	1	Select name of Borrower, as
appropriate. 

  

 Exhibit B - Page 1 

									
					
		  		  	(vi)	 	Accounts with respect to which the account debtor is any Governmental Authority, unless Borrower has, with respect to such Accounts, complied with the Federal Assignment of Claims Act of 1940 or
any applicable statute or municipal ordinance of similar purpose and effect	 	$                
					
		  		  	(vii)	 	Accounts due from an Account Debtor if such Account Debtor is in default on any other Debt owed to the Loan Parties, collectively	 	$                
					
		  		  	(viii)	 	Accounts with respect to which there is any potential offset or counterclaim or unresolved dispute with the respective Account Debtor (but only to the extent of such potential offset or
counterclaim or unresolved dispute)	 	$                
					
		  		  	(ix)	 	Accounts with respect to which the Account Debtor is the subject of any bankruptcy or other insolvency proceeding	 	$                
					
		  		  	(x)	 	Accounts subject to progress billings, bill and hold sales, guarantied sales, sale or return transactions, sales on approval, consignment sales or similar arrangements	 	$                
					
		  		  	(xi)	 	Accounts with respect to which the Account Debtor is located in New Jersey, or any other state denying creditors access to its courts in the absence of a Notice of Business Activities Report or
other similar filing, unless the applicable Loan Party has either qualified as a foreign corporation authorized to transact business in such state or has filed a Notice of Business Activities Report or similar filing with the applicable state agency
for the then current year	 	$                
					
		  		  	(xii)	 	Accounts with respect to which the Account Debtor is a creditor of any Loan Party (but only as to that portion of such Account which is less than or equal to the amount owed by such Loan Party
to such Person	 	$                
					
		  		  	(xiii)	 	Accounts deemed to be ineligible by the Administrative Agent in its reasonable credit judgment	 	$                

  

 Exhibit B - Page 2 

									
		  	3.	  	Eligible Accounts Receivable	 	$                
			
	B.	  	Value of Acquired Tangible Assets	 	
				
		  	1.	  	The fair market value of the “Tangible Assets” (as defined in the Marshall Stevens Appraisal Reports) as
established by the most recent Appraisal Report delivered in
accordance with Section 5.14 of the Credit
Agreement	 	$                
				
		  	2.	  	Events of Loss or Asset Dispositions that have occurred since the most recent Appraisal Report was delivered	 	$                
				
		  	3.	  	aggregate Acquired Tangible Asset value equals B.1 minus B.2	 	$                
			
	C.	  	Value of Purchased Post-Acquisition Equipment	 	
				
		  	1.	  	The fair market value of the Purchased Post-Acquisition Equipment as established by the most recent Appraisal
Report delivered in accordance with Section 5.14 of the Credit
Agreement	 	$                
				
		  	2.	  	Original cost of Purchased Post-Acquisition Equipment appraised in C.1	 	$                
				
		  	3.	  	Original cost of Purchased Post-Acquisition Equipment not appraised in C.1	 	$                
				
		  	4.	  	Events of Loss or Asset Dispositions that have occurred since the most recent Borrowing Base Report was
delivered	 	$                
				
		  	5.	  	aggregate Purchased Post-Acquisition Equipment value equals (a) the lesser of (C.1 and C.2) plus (b) C.3 and
minus (c) C.4	 	$                
			
	D.	  	Rig Count	 	
				
		  	1.	  	Current Rig Count	 	__________
			
	E.	  	Borrowing Base	 	
				
		  	1.	  	80% of Eligible Accounts Receivable (A.3)	 	$                
				
		  	2.	  	If Rig Count (D.1) is greater than 1,100, the product of 50% times the sum of B.3 + C.5	 	$                
				
		  	3.	  	If Rig Count (D.1) is equal to or less than 1,100, the product of 30% times the sum of B.3 + C.5	 	$                
				
		  	4.	  	Borrowing Base equals E.1 + (E.2 or E.3)	 	$                

  

 Exhibit B - Page 3 

									
	F.	  	Borrowing Base Availability	 	
				
		  	1.	  	Borrowing Base (E.4)	 	$                
				
		  	2.	  	outstanding Revolving Advances as of the date hereof	 	$                
				
		  	3.	  	outstanding Letter of Credit Exposure as of the date hereof	 	$                
				
		  	4.	  	Borrowing Base Availability equals F.1 – F.2 – F.3	 	$                

 IN WITNESS WHEREOF, I have hereto signed my name to this Borrowing Base Report as of
                        ,         . 
  

			
	[DIAMONDBACK HOLDINGS, LLC] [DIAMONDBACK ENERGY SERVICES, INC.]2
		
	 By:
	 	  

	 Name:
	 	  

	 Title:
	 	  

  

	2	Select name of Borrower, as
appropriate. 

  

 Exhibit B - Page 4 

 EXHIBIT C 
 FORM OF COMPLIANCE CERTIFICATE 
 [For Fiscal Quarter Ended
                        ] 
 [For Fiscal Year Ended                         ] 
 This certificate dated as of
                        ,          is prepared pursuant to the Credit
Agreement dated as of August 30, 2006 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”) among [Diamondback Holdings, LLC, a Delaware limited liability company][Diamondback Energy
Services, Inc., a Delaware corporation]3 (the “Borrower”), certain subsidiaries of the Borrower, as
guarantors, the lenders party thereto (the “Lenders”), and Fortis Capital Corp., as administrative agent for such Lenders (in such capacity, the “Administrative Agent”). Unless otherwise defined in this certificate,
capitalized terms that are defined in the Credit Agreement shall have the meanings assigned to them by the Credit Agreement. 
 The Borrower
hereby certifies (a) that no Default or Event of Default has occurred or is continuing, (b) that all of the representations and warranties made by each of the Loan Parties in the Credit Agreement and the other Loan Documents (other than
representations and warranties that relate to a specific prior date) are true and correct in all material respects as if made on this date, and (c) that as of the date hereof, the following amounts and calculations were true and correct:

  

							
	1.	  	Section 6.15(a) – Minimum Interest Coverage Ratio	  	
				
		  	        (a)	  	Consolidated EBITDA for the four fiscal quarter period ending on the date hereof	  	$                 
				
		  	        (b)	  	Consolidated Interest Expense for the four fiscal quarter period ending on the date hereof	  	$                 
			
		  	Interest Coverage Ratio = (a) divided by (b)	  	__________
			
		  	Minimum Interest Coverage Ratio permitted under Section 6.15(a) of Credit Agreement	  	3.00 to 1.00
			
		  	Compliance	  	Yes       No    

  

	3	Select name of Borrower, as
appropriate. 

  

 Exhibit C - Page 1 

							
			
	2.	  	Section 6.15(b) – Maximum Total Net Debt Leverage Ratio.	  	
				
		  	        (a)	  	Consolidated Debt as of the date hereof	  	$                
				
		  	        (b)	  	cash and Cash Equivalents as of the date hereof	  	$                
				
		  	        (c)	  	Consolidated EBITDA for the four fiscal quarter period ending on the date hereof	  	$                
			
		  	Total Net Debt Leverage Ratio = ((a) - (b)) divided by (c)	  	__________
			
		  	 Maximum Total Net Debt Leverage Ratio
 permitted under Section 6.15(b) of Credit Agreement :
	  	
			
		  	        For fiscal quarters ending September 30, 2006 through September 30, 2007	  	2.50 to 1.00
			
		  	        For fiscal quarters ending December 31, 2007 and thereafter	  	2.00 to l.00
			
		  	Compliance	  	Yes       No     

  

 Exhibit C - Page 2 

							
			
	3.	  	Section 6.15(c) – Minimum Tangible Net Worth	  	
				
		  	        (a)	  	Members’ Equity of the Borrower and its Subsidiaries as of the date hereof	  	$                
				
		  	        (b)	  	Intangible Assets of the Borrower and its Subsidiaries as of the date hereof	  	$                
			
		  	Tangible Net Worth = (a) - (b)	  	$                
				
		  	        (x)	  	Tangible Net Worth as of December 31, 2006	  	$                
				
		  	        (y)	  	Consolidated Net Income earned in each fiscal quarter ending after December 31, 2006 (with no deduction for a net loss in any such fiscal quarter)	  	$                
				
		  	        (z)	  	Net Issuance Proceeds	  	$                
			
		  	 Minimum Tangible Net Worth
 permitted under
Section 6.15(c) of Credit Agreement =
	  	
			
		  	(85% of (x)) plus (50% of (y)) plus (100% of (z))	  	$                
			
		  	Compliance	  	Yes      No    
			
	4.	  	Section 6.15(d) – Minimum Consolidated EBITDA	  	
				
		  	        (a)	  	Consolidated EBITDA for the fiscal quarter ending on the date hereof	  	$                
			
		  	 Minimum Consolidated EBITDA
 permitted under
Section 6.15(d) of Credit Agreement:
	  	
			
		  	        For the fiscal quarter ending September 30, 2006	  	$9,000,000
			
		  	        For the fiscal quarter ending December 31, 2006	  	$12,500,000
			
		  	        For the fiscal quarter ending March 31, 2007	  	$12,000,000
			
		  	        For fiscal quarters ending June 30, 2007 and thereafter	  	$15,000,000
			
		  	Compliance	  	Yes      No    

  

 Exhibit C - Page 3 

 IN WITNESS WHEREOF, I have hereto signed my name to this Compliance Certificate as of
                        ,         . 
  

			
	 [DIAMONDBACK HOLDINGS, LLC]
 [DIAMONDBACK
ENERGY SERVICES, INC.]4

		
	By:	 	  

	Name:	 	  

	Title:	 	  

  

	4	Select name of Borrower, as
appropriate. 

  

 Exhibit C - Page 4

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