MS HB1613

Reduces the base gasoline excise tax from 18 cents to 15 cents per gallon until a specified date, then to 12 cents per gallon thereafter

Reduces the undyed diesel fuel excise tax from 18 cents to 15 cents per gallon until a specified date, then to 12.3 cents per gallon thereafter

Creates a new variable fuel tax component equal to 6% of the average wholesale price of gasoline and diesel fuel, recalculated and adjusted twice yearly on January 1 and July 1 beginning in 2015

Maintains existing exemptions for government entities, including federal, state, county, municipal, and school district fuel purchases, as well as volunteer fire departments and certain nonprofit transportation entities

Preserves the existing fuel tax distribution framework, directing revenues to the State Highway Fund, counties, and aviation support programs