Modifies provisions relating to alternative fuel decals

HB 614 replaces Missouri's standard fuel tax for alternative fuel vehicles with an annual decal fee system. It sets specific fees based on vehicle type and weight - ranging from $75 for passenger vehicles to $1,000 for large commercial vehicles - with half-price for plug-in hybrids and reduced rates for farm vehicles. The bill also allows biennial decal purchases (twice the annual fee) and mandates a 20% annual fee increase (10% for largest vehicles) over five years starting in 2022. Additionally, it creates a temporary $8 decal for out-of-state vehicles using alternative fuels (excluding propane, CNG, and LNG) valid for 15 days.