For the purposes of this chapter, amounts of liquid natural gas and compressed natural gas shall be measured in gallon equivalents as follows:

1. (A) The diesel gallon equivalent standard for liquid natural gas shall be the equivalent of one gallon of motor fuel;
2. (B) The diesel gallon equivalent standard for compressed natural gas is one hundred thirty-nine and thirty one-hundredths cubic feet, which equals six and thirty-eight one-hundredths pounds.