Tex. Property Code § 113.012

(a) A trustee may enter into mineral transactions, including:

(1) negotiating and making oil, gas, and other mineral leases covering any land, mineral, or royalty interest at any time forming a part of a trust;

(2) pooling and unitizing part or all of the land, mineral leasehold, mineral, royalty, or other interest of a trust estate with land, mineral leasehold, mineral, royalty, or other interest of one or more persons or entities for the purpose of developing and producing oil, gas, or other minerals, and making leases or assignments granting the right to pool and unitize;

(3) entering into contracts and agreements concerning the installation and operation of plants or other facilities for the cycling, repressuring, processing, or other treating or handling of oil, gas, or other minerals;

(4) conducting or contracting for the conducting of seismic evaluation operations;

(5) drilling or contracting for the drilling of wells for oil, gas, or other minerals;

(6) contracting for and making "dry hole" and "bottom hole" contributions of cash, leasehold interests, or other interests towards the drilling of wells;

(7) using or contracting for the use of any method of secondary or tertiary recovery of any mineral, including the injection of water, gas, air, or other substances;

(8) purchasing oil, gas, or other mineral leases, leasehold interests, or other interests for any type of consideration, including farmout agreements requiring the drilling or reworking of wells or participation therein;

(9) entering into farmout contracts or agreements committing a trust estate to assign oil, gas, or other mineral leases or interests in consideration for the drilling of wells or other oil, gas, or mineral operations;

(10) negotiating the transfer of and transferring oil, gas, or other mineral leases or interests for any consideration, such as retained overriding royalty interests of any nature, drilling or reworking commitments, or production interests; and

(11) executing and entering into contracts, conveyances, and other agreements or transfers considered necessary or desirable to carry out the powers granted in this section, whether or not the action is now or subsequently recognized or considered as a common or proper practice by those engaged in the business of prospecting for, developing, producing, processing, transporting, or marketing minerals, including entering into and executing division orders, oil, gas, or other mineral sales contracts, exploration agreements, processing agreements, and other contracts relating to the processing, handling, treating, transporting, and marketing of oil, gas, or other mineral production from or accruing to a trust and receiving and receipting for the proceeds thereof on behalf of a trust.

(b) A trustee may enter into mineral transactions that extend beyond the term of the trust.