Tex. Tax Code § 202.154: PRODUCER TO PAY TAX ON OIL NOT SOLD.

If the producer does not sell oil produced in the same month it is produced, the producer shall pay the tax imposed by this chapter as if the oil were sold that month. In such a case, the working interest operator may pay the tax and deduct it from the interest of other interest holders.

Acts 1981, 67th Leg., p. 1739, ch. 389, Sec. 1, eff. Jan. 1, 1982.