qualified natural gas from geopressured brine
(3) Definitions For purposes of this subsection— (A) Natural gas sold under a fixed contract The term “natural gas sold under a fixed contract” means domestic natural gas sold by the producer under a contract, in effect on February 1, 1975 , and at all times thereafter before such sale, under which the price for such gas cannot be adjusted to reflect to any extent the increase in liabilities of the seller for tax under this chapter by reason of the repeal of percentage depletion for gas. Price increases after February 1, 1975 , shall be presumed to take increases in tax liabilities into account unless the taxpayer demonstrates to the contrary by clear and convincing evidence. (B) Regulated natural gas The term “regulated natural gas” means domestic natural gas produced and sold by the producer, before July 1, 1976 , subject to the jurisdiction of the Federal Power Commission, the price for which has not been adjusted to reflect to any extent the increase in liability of the seller for tax under this chapter by reason of the repeal of percentage depletion for gas. Price increases after February 1, 1975 , shall be presumed to take increases in tax liabilities into account unless the taxpayer demonstrates the contrary by clear and convincing evidence. (C) Qualified natural gas from geopressured brine The term “qualified natural gas from geopressured brine” means any natural gas— (i) which is determined in accordance with section 503 of the Natural Gas Policy Act of 1978 to be produced from geopressured brine, and (ii) which is produced from any well the drilling of which began after September 30, 1978 , and before January 1, 1984 .