FORM OF PAYMENT.
Tex. NAT. RES Code § 52.132.
in effectExcept as provided in Section 52.133 of this code, royalty payments shall be made in cash, by bank draft drawn on a state or national bank in Texas, by a post-office or express money order, or in any other form that the law may provide for making payments to the State Treasury and are payable to the commissioner in Austin.
