(2) Except as otherwise provided in subsections (3) and (4) of this section, 100 cubic feet of fuel used or sold in a gaseous state, measured at 14.73 pounds per square inch of pressure at 60 degrees Fahrenheit, is taxable at the same rate as a gallon of liquid fuel.
(3) One hundred twenty cubic feet of compressed natural gas used or sold in a gaseous state, measured at 14.73 pounds per square inch of pressure at 60 degrees Fahrenheit, is taxable at the same rate as a gallon of liquid fuel.
(4) One and three-tenths liquid gallons of propane at 60 degrees Fahrenheit is taxable at the same rate as a gallon of other liquid fuel. [Amended by 1959 c.188 §2; 1967 c.463 §2; 1981 c.698 §2; 1981 c.703 §2; 1983 c.727 §§2,6; 1985 c.209 §13; 1987 c.899 §§9,11,15; 1989 c.865 §2; 1991 c.497 §§8,9; 1995 c.311 §1; 2009 c.865 §49; 2013 c.648 §§1,3; 2017 c.750 §§42,43]