Okla. Stat. tit. 60, § 72

Said trustee shall have the power and authority to make valid oil and gas leases and other mining leases, upon said lands, for a term not to exceed ten (10) years, and as long thereafter as oil, gas or other minerals may be produced in paying quantities, said leases to be executed and approved under the same procedure now followed in leasing lands for oil and gas purposes in guardianships and estates, the bonus and rentals therefrom to be paid to the life tenant or other person entitled thereto.