Tex. Natural Resources Code § 111.083: DUTY OF CERTAIN COMMON PURCHASERS.

A common purchaser as defined in Subdivision (2), Subsection (a), Section 111.081 of this code shall purchase or take the natural gas purchased or taken by it as a common purchaser under rules prescribed by the commission in the manner, under the inhibitions against discriminations, and subject to the provisions applicable under this chapter to common purchasers of oil.

Acts 1977, 65th Leg., p. 2583, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.