Texas Tax Code
Tex. Tax Code § 202.053 — MARKET VALUE
The market value of oil is the actual market value plus any bonus, premium, or other thing of value paid for the oil or that the oil will reasonably bring if lawfully produced. Acts 1981, 67th Leg., p. 1737, ch. 389, Sec. 1, eff. Jan. 1, 1982.
Source: official text