Document:

Amendment No. 1 to Initial Public Offering

EXHIBIT 10.20 
 
AMENDMENT NO. 1 TO INITIAL PUBLIC OFFERING AND SPLIT-OFF AGREEMENT 
 
This is Amendment No. 1 (“Amendment”), dated as of
March 25, 2003, by and among Viacom Inc., a Delaware corporation (“Viacom”), Viacom International Inc., a Delaware corporation and a wholly owned subsidiary of Viacom (“Viacom International”) and Blockbuster Inc., a Delaware
corporation and consolidated subsidiary of Viacom (“Blockbuster”), to that certain Initial Public Offering and Split-Off Agreement entered into by and among Viacom, Viacom International and Blockbuster as of August 16, 1999 (the “IPO
Agreement”). 
 
WHEREAS, Viacom, Viacom
International and Blockbuster set forth in the IPO Agreement the principal arrangements between them regarding the initial public offering and split-off; and 
 
WHEREAS, Viacom, Viacom International and Blockbuster now wish to amend certain of those arrangements. 
 
NOW, THEREFORE, in consideration of the premises set forth
above and pursuant to Section 10.07 of the IPO Agreement, the parties hereto agree as follows: 
 

	 	1.	 	Section 5.01(xiii) of the IPO Agreement is hereby deleted and amended to read in its entirety as follows: 

 
(xiii) Not less than 30 days prior to making any changes
regarding the independent certified public accountant engaged by Blockbuster (“Blockbuster’s Auditors”) which would result in Blockbuster’s Auditors being other than the independent certified public accountant engaged by
Viacom, Blockbuster’s audit committee chair shall discuss with Viacom’s audit committee chair the change under consideration. Such 30 day period shall be reduced to the extent that Blockbuster’s audit committee chair shall deem
necessary in light of extenuating circumstances. 
 

	 	2.	 	Section 5.01(xviii) of the IPO Agreement is hereby deleted and amended to read in its entirety as follows: 

 
(xviii) Notwithstanding clause (xvii) above, Blockbuster
shall make any changes in its accounting principles that are requested by Viacom in order for Blockbuster’s accounting principles to be consistent with those of Viacom unless Blockbuster’s audit committee determines otherwise after
consultation with Viacom’s audit committee. 
 

	 	3.	 	This Amendment shall be deemed effective as of March 25, 2003. 

 

	 	4.	 	Except as expressly provided in this Amendment, the IPO Agreement shall not be deemed amended, modified or altered in any manner whatsoever.

 

	 	5.	 	Capitalized terms not otherwise defined herein shall have the meaning ascribed to such terms in the IPO Agreement. 

 
IN WITNESS
WHEREOF, the undersigned have caused this Amendment No. 1 to Initial Public Offering and Split-Off Agreement to be duly executed and delivered as of the date first written above. 
 

	 VIACOM INC.

	
	 By:
	 	 /s/    Michael D. Fricklas

	 	 	 Name:     Michael D. Fricklas

	 	 	 Title:       EVP, General Counsel and
Secretary

 

	 VIACOM INTERNATIONAL INC.

	
	 By:
	 	 /s/    Michael D. Fricklas

	 	 	 Name:    Michael D. Fricklas

	 	 	 Title:      EVP, General Counsel and
Secretary

 

	 BLOCKBUSTER INC.

	
	 By:
	 	 /s/    Edward B. Stead

	 	 	 Name:    Edward B. Stead

	 	 	 Title:      EVP & General
Counsel

 
 

2Description of Compensation Arrangements

 
EXHIBIT 10.21

 
Description of Compensation Arrangements
for Independent Directors 
 
On March 25, 2003,
the Board of Directors of the Company approved compensation arrangements for directors who do not serve as officers or employees of Viacom Inc. or the Company, the terms of which are as follows: 
 

	 	1.	 	Annual Retainer.  Directors who do not serve as officers or employees of Viacom Inc. or the Company are entitled to receive an annual retainer fee
of $50,000 for membership on the Company’s Board of Directors. Of this amount, $25,000 is paid in the Company’s Class A Common Stock that is non-transferable for one year after it is paid. The other $25,000 is paid in cash.

 

	 	2.	 	Meeting Fee.  Directors who do not serve as officers or employees of Viacom Inc. or the Company are also entitled to a per meeting fee of $2,000 for
attendance at each meeting of the Board of Directors and $1,000 for attendance at each committee meeting if such meeting is held on a different day from the day of a meeting of the Board of Directors. 

 

	 	3.	 	Retainer for Committee Chairs.  In addition to the compensation set forth above, the Chair of the Audit Committee is entitled to receive an annual
retainer fee of $7,500 and the Chair of the Senior Executive Compensation Committee is entitled to receive an annual retainer fee of $5,000.Amended and Restated Business Opportunities Agreement

 
EXHIBIT 10.1

 
AMENDED AND RESTATED 
BUSINESS OPPORTUNITIES AGREEMENT 
 
This AMENDED AND RESTATED BUSINESS OPPORTUNITIES AGREEMENT (this “Agreement”), dated as of January 31, 2003, is entered into by
Dorchester Minerals, L.P., a Delaware limited partnership (the “Partnership”); Dorchester Minerals Management LP, a Delaware limited partnership and the general partner of the Partnership (the “General Partner”); Dorchester
Minerals Management GP LLC, a Delaware limited liability company and the general partner of the General Partner (“Management GP”); SAM Partners, Ltd., a Texas limited partnership (“SAM”), Vaughn Petroleum, Ltd., a Texas limited
partnership (“Vaughn”), Smith Allen Oil & Gas, Inc., a Texas corporation (“SAOG”), P.A. Peak, Inc., a Delaware corporation or any successor thereto by conversion or reorganization (“Peak”), and James E. Raley, Inc.,
a Delaware corporation or any successor thereto by conversion or reorganization (“Raley”) (as used herein, each of SAM, Vaughn, SAOG, Peak and Raley are referred to as a “GP Party”), and each individual that both is an executive
officer of any Operating Company (defined below) and has agreed in writing to be bound as an “Officer” under this Agreement (each, an “Officer”). 
 
RECITALS: 
 
A Business Opportunities Agreement, dated December 13, 2001, (the “Original Agreement”) was executed and delivered
simultaneously with the execution and delivery of the Combination Agreement dated December 13, 2001 (the “Combination Agreement”) among the Partnership, the General Partner, the Management GP, Dorchester Minerals Operating LP, a Delaware
limited partnership and a subsidiary of the General Partner (the “Operating Subsidiary” and, together with its general partner, Dorchester Minerals Operating GP LLC, the “Operating Companies”), Dorchester Hugoton, Ltd., a Texas
limited partnership (“DHL”), Republic Royalty Company, a Texas general partnership (“RRC”), and Spinnaker Royalty Company, L.P., a Texas limited partnership (“SRC”). Pursuant to the Combination Agreement, DHL, RRC and
SRC will combine their businesses and properties into the Partnership (the “Transaction”). The parties to the Original Agreement (i) have, pursuant to that certain letter agreement dated January 22, 2003 (the “Amendment”),
amended the Original Agreement and (ii) desire to amend and restate the Original Agreement in its entirety in this Agreement as of the date hereof to provide for the following terms and conditions of the Original Agreement, as amended by the
Amendment. All capitalized terms used and not defined herein (as well as the term person) have the meanings attributable to them in the Combination Agreement. As used herein, the term “Affiliate” means, in addition to any
“affiliate” as defined in the Combination Agreement, any owner, director, manager, managing member, officer or employee of any such affiliate; provided, however, that the Operating Companies shall not be Affiliates of the General Partner
for purposes of this Agreement, and neither the Operating Companies nor the General Partner shall be Affiliates of any GP Party for purposes of this Agreement. 
 
The GP Parties are currently all of the general partners of RRC, SRC and DHL. Immediately following the Transaction, the GP Parties will
(directly or indirectly) own all of 
 

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the equity of the General Partner and own units of limited partnership interest in the Partnership. 
 
Each of the GP Parties believes that it and its respective
partners in RRC, SRC or DHL, as applicable, will benefit from the Transaction and that the Transaction is in its best interest and in the best interest of its respective partners. The GP Parties, however, are unwilling to permit the General Partner,
the Management GP and the Operating Subsidiary to enter into the Combination Agreement and to agree in the Combination Agreement to enter into the Amended and Restated Partnership Agreement of the Partnership (the “Partnership Agreement”)
upon the closing of the Transaction unless the respective rights and responsibilities of the GP Parties, the General Partner, the Management GP, the Operating Companies and their Affiliates and the Partnership with respect to the matters addressed
in this Agreement are clearly delineated and agreed upon in advance for the reasons referred to below. 
 
The GP Parties engage in the acquisition and ownership of oil and gas properties, including but not limited to oil and gas net profits
interests, mineral interests and royalty interests in the United States. The businesses in which the GP Parties engage are similar to those in which the Partnership will engage following the Transaction. 
 
As the owners of the General Partner following the
Transaction, the GP Parties may owe certain duties to the Partnership. Pursuant to the Limited Liability Company Agreement of Management GP, each GP Party will have the right to designate a person (the “Designees”) to serve on the
committee of managers of the Management GP following the Transaction. Certain of the Designees may be directors, members, managers and/or officers of or employed by the General Partner, an Operating Company, a GP Party, an entity which possesses
management authority over a GP Party, or a company in which the General Partner or a GP Party has an interest. These Designees will have duties to the Partnership and duties to the General Partner, an Operating Company, the GP Party or such other
companies (as applicable). 
 
The law relating to
the duties that the GP Parties or their Designees or Affiliates may owe to the Partnership is not clear. The application of such law to particular circumstances is often difficult to predict, and if a court were to hold that a GP Party or one of
their Designees or Affiliates breached any such duty, the GP Party or such Designee or Affiliate could be held liable for damages in a legal action brought on behalf of the Partnership. 
 
In order to induce the GP Parties to permit the General Partner, the Management GP and the Operating
Subsidiary to enter into the Combination Agreement and/or the Partnership Agreement, as applicable, the Partnership is willing to enter into this Agreement in order (i) to renounce, effective upon the consummation of the Transaction, any interest or
expectancy it may have in the classes or categories of business opportunities specified herein that are presented to or identified by any Affiliate of the General Partner, a GP Party or any Affiliate thereof, or any of the Designees, as more fully
described herein; (ii) to permit the GP Parties and their respective Affiliates to continue to conduct their respective businesses and to 
 

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pursue certain business opportunities without an obligation, except as provided herein, to offer such opportunities to the Partnership, and
(iii) to permit any Designee to continue to discharge his or her responsibilities as a director, member, manager, officer or employee of the General Partner, an Operating Company, a GP Party or Affiliate thereof or a company in which a GP Party has
an interest. 
 
NOW, THEREFORE, in consideration of
the foregoing, the mutual covenants, rights, and obligations set forth in this Agreement, and the benefits to be derived herefrom, and other good and valuable consideration, the receipt and the sufficiency of which each of the parties hereto
acknowledges and confesses, the parties hereto agree as follows: 
 
1. Scope of Business of the Partnership Following the Transaction. The Partnership covenants and agrees that, following consummation of the Transaction, except with the consent of General Partner (which it may withhold in its
sole discretion), the Partnership will not engage in any business not allowed by the Partnership Agreement as in effect immediately following the closing of the Transaction. The Partnership hereby renounces, effective upon consummation of the
Transaction, any interest or expectancy in any business opportunity (each, together with those business opportunities so designated in Section 3(d) hereof, a “Renounced Opportunity”) that does not consist of the Oil and Gas Business (as
defined below) within the Designated Area (as defined below). The “Oil and Gas Business” means the acquisition, management, ownership or sale of oil and gas assets or properties, including but not limited to mineral fee interests, net
profits interests and royalty and overriding royalty interests but specifically excluding working interests. “Designated Areas” means the areas identified on Schedule A attached hereto. 
 
2. Business Opportunities. The Partnership recognizes
that Affiliates of the General Partner, the GP Parties and their Affiliates, and the Designees (i) participate and will continue to participate in the Oil and Gas Business, directly and through Affiliates, (ii) may have interests in, participate
with, and maintain seats on the boards of directors of or serve as officers, managers, partners, members or employees of other companies engaged in the Oil and Gas Business and (iii) may develop business opportunities for the GP Parties and their
Affiliates and such other companies. The Partnership recognizes that the GP Parties and their Affiliates and the Designees may be engaged in the Oil and Gas Business in competition with the Partnership. The Partnership: 
 

	 	(a)	 	acknowledges and agrees that Affiliates of the General Partner, the GP Parties and their Affiliates, the Designees, and such other companies shall not be restricted
or proscribed by the relationship between the Partnership and General Partner and/or the Operating Companies, or otherwise, from engaging in the Oil and Gas Business or any other business, regardless of whether such business activity is in direct or
indirect competition with the business or activities of the Partnership, if such business activity either 

 

	 	(i)	 	is a Renounced Opportunity; or 

 
 

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	 	(ii)	 	is engaged in on any basis that is consistent with the standards set forth in Section 5 hereof; 

 

	 	(b)	 	acknowledges and agrees that Affiliates of the General Partner, the GP Parties and their Affiliates, the Designees, and such other companies shall not have any
obligation to offer the Partnership any business opportunity if either 

 

	 	(i)	 	such business opportunity is a Renounced Opportunity; or 

 

	 	(ii)	 	their activities are conducted in accordance with the standards set forth in Section 5 hereof; 

 

	 	(c)	 	renounces any interest or expectancy in any business opportunity pursued by any Affiliate of the General Partner, any GP Party or any Affiliate thereof, any
Designee, or any such other company if such business opportunity either 

 

	 	(i)	 	is a Renounced Opportunity; or 

 

	 	(ii)	 	is pursued in accordance with the standards set forth in Section 5 hereof; and 

 

	 	(d)	 	waives any claim that any business opportunity pursued by any Affiliate of the General Partner, any GP Party or Affiliate thereof, any Designee, or any such other
company constitutes a business opportunity of the Partnership that should have been presented to the Partnership, unless such business opportunity both 

 

	 	(i)	 	is not a Renounced Opportunity; and 

 

	 	(ii)	 	was pursued in violation of the standards set forth in Section 5 hereof. 

 
The parties agree (x) that, notwithstanding the foregoing, the renouncement and other matters set forth above in this Section
2 shall not limit the contractual obligations in Sections 3 and 4 of the persons specified in such Sections 3 and 4, and (y) the contractual obligations contained in Sections 3 and 4 shall not be limited by virtue of the renouncement and other
matters set forth above in this Section 2. 
 
3.
Notification of the Partnership Business Opportunities. 
 
(a) If (i) a GP Party or any Subsidiary thereof or any Officer or any Subsidiary thereof has signed a binding agreement to purchase (a “Purchase Agreement”) 
 

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oil and gas interests, including but not limited to, (a) oil and gas net profits interests in the United States, (b) royalty interests and
other mineral interests in the United States, and (c) to the extent such interests are within the geographic boundaries of any lease, tract, unit or parcel of land then owned by the Partnership or in which the Partnership at that time has an
interest, working interests and other cost bearing interests (the “Oil and Gas Interests”) and (ii) the purchase price to be paid for such Oil and Gas Interests is greater than three percent (3%) of the Market Capitalization of the
Partnership (as defined herein) as determined on the date such Purchase Agreement is fully executed (a transaction meeting the requirements of both (i) and (ii) shall be referred to herein as a “Qualifying Acquisition Opportunity”), then
such party (the “Notifying Party”) hereby agrees to provide, or to cause its applicable Subsidiary to provide, written notice to the Partnership (the “Partnership Notice”) of the Qualifying Acquisition Opportunity at least 21
days prior to the consummation the transactions contemplated by the Purchase Agreement, so that the Partnership may determine whether to pursue the purchase of the Oil and Gas Interests directly from the seller of the Oil and Gas Interests (the
“Seller”). Beginning on January 1, 2004, a Manager of Management GP that is also an Affiliate or employee of (a) the GP Parties or any Subsidiary thereof or (b) any Officer or any Subsidiary thereof shall also be subject to the obligations
provided in this Section 3 and such obligations on such Manager will apply to all opportunities without regard to the amount of the purchase price to be paid for such Oil and Gas Interests. As used herein, “Market Capitalization of the
Partnership” shall mean the total value of all outstanding units of limited partnership interest in the Partnership as determined by the “Current Market Price” (as defined in the Partnership Agreement). In the event that the purchase
price to be paid by the Notifying Party to the Seller pursuant to the Purchase Agreement will be paid in consideration other than cash, the value of such consideration shall be determined by the Advisory Committee (the “Advisory
Committee”) of the Partnership (as defined in the Agreement of Limited Partnership of the Partnership), upon request of the Notifying Party. At the option of the Notifying Party, the Notifying Party may (but is not obligated to) provide the
Partnership Notice and the information described in subsection (b) below with respect to a transaction which would otherwise qualify as a Qualifying Acquisition Opportunity prior to signing a binding agreement with respect to such transaction.

 
(b) As general partner of the General Partner,
Management GP shall, on behalf of the Partnership, forward copies of such Partnership Notice and other information to the persons serving on the Advisory Committee as promptly as practicable upon the Partnership’s receipt thereof. Within 5 days
of receipt of such notice, the Partnership shall notify the Notifying Party as to whether the Partnership will exercise its right to pursue such opportunity (the “Partnership Option”), unless such opportunity reasonably requires a shorter
response time, in which case Notifying Party shall describe the circumstances giving rise to the need for a shorter response time in the Partnership Notice and the Partnership shall be required to respond within such shorter time period.

 
(c) If the Partnership timely notifies the
Notifying Party of its intent to exercise a Partnership Option pursuant to subsection (b) above and, within 10 days after 
 

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the Partnership’s receipt of the Partnership Notice (or such extended period as is agreed by the Partnership and the Seller and is
specified in a written notice of the Partnership and the Seller to the Notifying Party), the Notifying Party receives written notice from the Partnership and the Seller that the Seller desires to sell the oil and gas interests to the Partnership
instead of the Notifying Party, the Notifying Party hereby agrees to take, or cause to be taken, any and all commercially reasonable action as is necessary to effect the termination of the Purchase Agreement between the Notifying Party and the
Seller; provided Seller agrees such termination is to be effective only upon the execution of a binding agreement between the Partnership and the Seller. Upon exercise of the Partnership Option, the Partnership is not required to pursue such
Qualifying Acquisition Opportunity on terms identical to those under which the Notifying Party intended to pursue such opportunity. 
 
(d) If the Partnership notifies the Notifying Party that it declines to pursue such Qualifying Acquisition Opportunity, or fails to
respond to a Partnership Notice within the time period provided in Section 3(b) above, the Notifying Party shall have no further obligation to the Partnership under this Section 3 with respect to such Qualifying Acquisition Opportunity and, in
addition, such Qualifying Acquisition Opportunity shall be a “Renounced Opportunity” for purposes of this Agreement even if would not fall within such definition but for this sentence. If the binding agreement between the Seller and the
Partnership with respect to the Qualifying Acquisition Agreement is terminated, then notwithstanding any other provision of this Section 3, the Notifying Party may pursue the relevant Qualifying Acquisition Opportunity without further obligation
under this Section 3. 
 
(e) Determinations
regarding whether the Partnership shall exercise the Partnership Option shall be made by the Advisory Committee. 
 
4. Other Rights to Purchase by the Partnership. 
 
(a) In the event that any GP Party or a Subsidiary thereof or any Officer or any Subsidiary thereof (each, an
“Offeror”) acquires any Oil and Gas Interests or oil and gas working interests which are located in the Designated Areas or which as a package include Oil and Gas Interests or oil and gas working interests at least twenty percent (20%) of
the net acreage of which is located within the Designated Area (any such interests are referred to herein as the “Restricted Assets”), then not later than one month after the consummation of the acquisition by such Offeror of the
Restricted Assets, such Offeror shall notify the Partnership of such purchase and offer the Partnership the opportunity to purchase such Restricted Assets. Such notice shall furnish to the Partnership all information in Offeror’s possession
regarding such the Restricted Assets that is material to the Partnership’s decision regarding whether or not to exercise the option set forth in this Section 4. Within twenty (20) days of receipt of such notice and information (forty (40) days
in the event Offeror notifies the Partnership of more than one such opportunity during the same time period), the Partnership shall notify the Offeror that either (i) the General Partner has elected, with the approval of the Advisory 
 

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Committee, not to cause the Partnership to purchase such Restricted Assets, in which event the Offeror shall be forever free to continue to
own or operate such Restricted Assets, or (ii) the General Partner has elected to cause the Partnership to purchase such Restricted Assets, in which event the closing of such transaction shall occur on a mutually agreeable date not more than twenty
(20) business days after the date of such notice of intent to exercise the option. The purchase price, which shall be payable in immediately available funds, shall be equal to the purchase price paid for the Restricted Assets. In the event that the
Restricted Assets were purchased by the Offeror other than for cash and the Partnership and the Offeror are unable to agree on the value of such consideration, the value of such consideration shall be determined (the “Appraisal”) by an
appraiser appointed by mutual agreement of the Partnership and the Offeror (the “Appraiser”). The fees and expenses of the Appraisal shall be paid one-half by the Partnership and one-half by the Offeror. The Partnership and the Offeror
shall furnish such information to the Appraiser as shall be needed to complete the appraisal. Such Appraisal shall be completed within thirty (30) days after the appointment of Appraiser. The Partnership may revoke its election to purchase the
Restricted Assets within five (5) days of the receipt of the Appraisal, provided that if the Partnership so elects to revoke, it shall pay 100% of the fees and expenses of the Appraiser. 
 
(b) The General Partner and its Subsidiaries and the GP Parties and their Subsidiaries shall have no
obligation under this Section 4 with respect to interests or properties which were part of a Qualifying Acquisition Opportunity if such party has not violated the provisions of Section 3. 
 
5. Standards for Separate Conduct of Business. Any GP Party or any Affiliate thereof, any Designee or
any other company in which any Affiliate of the General Partner, or any GP Party or any Affiliate thereof, has an interest or of which a Designee is an owner, director, manager, partner, officer or employee (except for the Management GP, the General
Partner and their Subsidiaries) (“Separate Parties”) shall be deemed to meet the standards referred to in Sections 2(a)(ii), 2(b)(ii), 2(c)(ii) and 2(d)(ii) if its businesses are conducted entirely through the use of its own personnel and
assets and not with the use of any personnel or assets of the Partnership, the General Partner or the Operating Subsidiary. Without limiting the foregoing, such standards will be deemed met with respect to a business opportunity if (a) it is
identified by or presented to such Designee or personnel of such Separate Party and developed and pursued solely through the use of their personnel and assets (and not based on confidential information disclosed by or on behalf of the Partnership,
the Management GP, the General Partner or a Subsidiary of the General Partner during the course of the relationship of such Designee or such Separate Party’s personnel with the Partnership, the Management GP, the General Partner or a Subsidiary
of the General Partner), and (b) it did not come to the attention of such Designee or such Separate Party’s personnel in, and as a direct result of, his or her capacity as a manager of the Management GP or an officer or employee of the General
Partner, an Operating Company or a Subsidiary of either; provided that (i) if such opportunity is separately identified by a Designee or a Separate Party or its personnel or separately presented to a Separate Party or its personnel by a person other
than such 
 

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Designee, the Separate Party or such personnel, then the Designee, the Separate Party or its personnel, as applicable, shall be free to
pursue such opportunity even if it also came to such person’s attention as a result of and in his or her capacity as an owner or manager of the Management GP or a director, manager, officer or employee of the General Partner, an Operating
Company or a Subsidiary of either and (ii) if such opportunity is presented to or identified by a Designee, a Separate Party or its personnel other than solely as a result of and in his or her capacity as an owner or manager of the Management GP or
an owner or employee of the General Partner, an Operating Company or a Subsidiary thereof, such person shall be free to pursue such opportunity even if it also came to such person’s attention as a result of and in his or her capacity as an
owner or manager of the Management GP or an owner or employee of the General Partner, an Operating Company or a Subsidiary of either. Nothing in this Agreement will allow a Designee or personnel of a Separate Party to usurp a corporate opportunity
solely for his or her personal benefit (as opposed to pursuing, for the benefit of a Separate Party, an opportunity in accordance with the standards set forth in this Section 5). 
 
6. Ownership of Securities. Notwithstanding the foregoing, neither Section 3 nor Section 4 shall apply
to the purchase or ownership of (i) limited partnership interests in the Partnership or (ii) securities of any class registered under Section 12 of the Securities Exchange Act of 1934 (regardless of the types or locations of businesses in which the
issuer thereof engages) if, in the case of this clause (ii), following any such purchase the applicable party owns, in the aggregate, less than 5% of such class. 
 
7. Termination of Restrictions. 
 
(a) All restrictions imposed by this Agreement on any person (other than the Partnership) shall terminate at
such time as the General Partner no longer serves as a general partner of the Partnership, with respect to any business opportunity or other matter that is first presented to or becomes known to such person after such time as the General Partner no
longer serves as a general partner of the Partnership; and shall terminate as to all business opportunities and other matters six (6) months after such time as the General Partner no longer serves as a general partner of the partnership, regardless
of when such business opportunity arose or was presented to or became known to such person. 
 
(b) Without limiting the generality of Section 7(a), all restrictions imposed by this Agreement on any Officer shall terminate at such time as such person no longer serves as an executive officer of
any Operating Company, with respect to any business opportunity or other matter that is first presented to or becomes known to such person after such time as such person no longer serves as an executive officer of any Operating Company; and shall
terminate as to all business opportunities and other matters six (6) months after such time as such Officer no longer serves as an executive officer of any Operating Company, regardless of when such business opportunity arose or was presented to or
became known to such person. 
 

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8. Future
Officers. Each GP Party agrees to use commercially reasonable efforts to cause any person elected or appointed as an executive officer of any Operating Company to agree to be bound as an “Officer” under this Agreement. 
 
9. Waiver of Rights; Amendment. Any rights of the
Partnership under this Agreement, including but not limited to rights to receive certain notices pursuant to Section 3 and 4, may be waived on behalf of the Partnership by the Advisory Committee. This Agreement may not be amended by or on behalf of
the Partnership without the approval of the Advisory Committee (as defined in the Partnership Agreement) of the Partnership. 
 
10. Notices. All notices, requests, demands and other communications required or permitted to be given or made hereunder by any
party hereto shall be in writing and shall be deemed to have been duly given or made if (i) delivered personally, (ii) transmitted by first class registered or certified mail, postage prepaid, return receipt requested, (iii) sent by prepaid
overnight courier service or (iv) sent by telecopy or facsimile transmission, answer back requested, to the parties at the following addresses (or at such other addresses as shall be specified by the parties by like notice): 
 
If to the Partnership, the General Partner or
the Management GP: 
c/o Dorchester Minerals Management GP LLC 
3738 Oak Lawn Ave., Suite 300 
Dallas, Texas 75219 
Attention: Chief Executive Officer 
Telecopy No.:
214-559-0301 
 
If to Vaughn:

c/o VPL(GP), LLC 
3738 Oak Lawn Ave., Suite 101 
Dallas, Texas 75219 
Attention: Robert C. Vaughn 
Telecopy No.: 214-522-7433

 
with a copy to: 
 
c/o VPL(GP), LLC 
3738 Oak Lawn Ave., Suite 101 
Dallas, Texas 75219 
Attention: Benny D. Duncan 
Telecopy No.: 214-522-7433

 
If to SAM: 
c/o SAM Partners Management, Inc. 
3738 Oak Lawn Ave., Suite 300 
Dallas, Texas 75219 
 

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Attention: H. C. Allen, Jr. 
Telecopy No.: 214-559-0301 
 
If to SAOG: 
3738 Oak Lawn Ave., Suite 300 
Dallas, Texas 75219

Attention: William Casey McManemin 
Telecopy No.: 214-559-0301 
 
If to Peak: 
1919 S. Shiloh Rd. 
Suite 600 B LB48 
Garland, Texas 75042 
Attention: Preston A. Peak 
Telecopy No.: 972-864-9095

 
If to Raley : 
1919 S. Shiloh Rd. 
Suite 600 B LB48 
Garland, Texas 75042 
Attention: James E. Raley 
Telecopy No.: 972-864-9095 
 
Such notices, requests, demands and other communications shall be effective (i) if delivered personally or sent by courier service, upon actual receipt by the intended recipient, (ii) if mailed, upon the earlier of five days after
deposit in the mail or the date of delivery as shown by the return receipt therefor or (iii) if sent by telecopy or facsimile transmission, when the answer back is received. 
 
11. Binding Effect; Assignment; Third Party Benefit. This Agreement shall be binding upon and inure to
the benefit of the parties hereto and their respective successors and permitted assigns; provided, however, that neither this Agreement nor any of the rights, interests or obligations hereunder shall be assigned by any of the parties hereto (by
operation of law or otherwise) without the prior written consent of the other parties. This Agreement is intended to confer rights and benefits upon the Designees, Affiliates of the GP Parties and the companies referred to in Section 2. Except as
provided in the preceding sentence, nothing in this Agreement, express or implied, is intended to or shall confer upon any person other than the parties hereto any rights, benefits or remedies of any nature whatsoever under or by reason of this
Agreement. 
 
12. Severability. If any
provision of this Agreement is held to be unenforceable, this Agreement shall be considered divisible and such provision shall be deemed inoperative to the extent it is deemed unenforceable, and in all other respects this Agreement shall remain in
full force and effect; provided, however, that if any such provision may be made enforceable by limitation thereof, then such provision shall be 
 

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deemed to be so limited and shall be enforceable to the maximum extent permitted by Applicable Law. 
 
13. Injunctive Relief. The parties hereto acknowledge
and agree that irreparable damage would occur in the event any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to
an injunction or injunctions to prevent breaches of the provisions of this Agreement, and shall be entitled to enforce specifically the provisions of this Agreement, in any court of the United States or any state thereof having jurisdiction, in
addition to any other remedy to which the parties may be entitled under this Agreement or at law or in equity. 
 
14. Miscellaneous. This Agreement may be signed in any number of counterparts, each of which when so executed and delivered shall
be deemed an original, and such counterparts together shall constitute one instrument. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without regard to conflict of law principles.

 
[SIGNATURES APPEAR ON FOLLOWING PAGE]

 

11 

IN WITNESS WHEREOF, the undersigned have duly executed this Agreement as of the date set
forth above. 
 

	 DORCHESTER MINERALS, L.P.

	
	 By:
	 	   Dorchester Minerals Management LP, General
   Partner

	
	 	 	 By:
	 	   Dorchester Minerals Management GP LLC,
General Partner

	
	 	 	 	 	 By:
	 	 /s/    JAMES E.
RALEY        

	 	 	 	 	 	 	 James E. Raley, COO

 

	 DORCHESTER MINERALS MANAGEMENT LP

	
	 By:
	 	   Dorchester Minerals Management GP LLC,
   General Partner

	
	 	 	 By:
	 	 /s/    JAMES E.
RALEY        

	 	 	 	 	 James E. Raley, COO

 

	 DORCHESTER MINERALS MANAGEMENT GP LLC

	
	 By:
	 	 /s/    JAMES E.
RALEY        

 James E. Raley, COO

	 	 

 

	 SAM PARTNERS, LTD.

	
	 By:
	 	   SAM Partners Management, Inc., General Partner

	 By:
	 	 /s/    WILLIAM CASEY
MCMANEMIN        

	 	 	 William Casey McManemin, Vice-President

 

	 VAUGHN PETROLEUM, LTD.

	
	 By:
	 	   VPL(GP), LLC, General Partner

	 By:
	 	 /s/    ROBERT C.
VAUGHN        

	 	 	 Robert C. Vaughn, Manager

 

	 SMITH ALLEN OIL & GAS, INC.

	
	 By:
	 	 /s/    WILLIAM CASEY
MCMANEMIN, Vice President        

	 	 	 William Casey McManemin, Vice President

 

12 

	 P.A. PEAK, INC.

	
	 By:
	 	 /s/    PRESTON A.
PEAK        

	 	 	 Preston A. Peak, President

 

	 JAMES E. RALEY, INC.

	
	 By:
	 	 /s/    JAMES E.
RALEY        

	 	 	 James E. Raley, President

 

	 The following persons are executing this Agreement as
“Officers”:

 

	 /s/    WILLIAM CASEY
MCMANEMIN        

	 William Casey McManemin

 

	 /s/    JAMES E.
RALEY        

	 James E. Raley

 

	 /s/    H. C. ALLEN,
JR.        

	 H. C. Allen, Jr.

 

13 

 
Schedule A

 
Designated Area 
 
Texas County, Oklahoma: 
 
T 2N - 6N 
R 14 ECM - 19 ECM 
 
Stevens County, Kansas: 
 
T 33S - 35S 
R 38W - 39W 
 

14

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