In upstream oil & gas: include any mineral oil[,] hydrocarbon gas, bitumen, asphalt, mineral gas and all other similar or naturally associated substances with the exception of coal, peat, bituminous shale and/or other stratified mineral fuel deposits [Section 3(a), Oil Exploration and Development Act of 1972]
In downstream oil & gas: the naturally occurring mixture of compounds of hydrogen and carbon with a small proportion of impurities and shall include any mineral oil, petroleum gas, hydrogen gas, bitumen, asphalt, mineral wax, and all other similar or naturally-associated substances, with the exception of coal, peat, bituminous shale and/or other stratified mineral fuel deposits [Section 4(m), Downstream Oil Industry Deregulation Act of 1998; Section 3(hh), Downstream Oil Industry Deregulation Act of 1998 IRR]