MS HB1590

Defines "diesel gallon equivalent" as 6.06 pounds of liquefied natural gas (LNG), with provision to adopt National Conference on Weights and Measures definition if different.

Establishes separate tax rate of 18 cents per diesel gallon equivalent on LNG (reducing to 14.4 cents on specified date) for distributors and motor vehicle operators.

Removes LNG from compressed natural gas tax provisions and separates LNG taxation into its own category based on diesel gallon equivalents rather than cubic feet.

Exempts motor vehicles using only LNG from requirement to obtain compressed gas user decals from Department of Revenue.

Effective date: July 1, 2015.