Revenue and taxation; vehicle excise tax; transfer vehicle ownership; effective date.

HB 1604 updates Oklahoma's vehicle excise tax rules, changing rates for off-road vehicles (4.5% of sale price with a $5 minimum) and adjusting used vehicle tax brackets. It adds a $10 flat fee for heavy trucks (55,000+ pounds), trailers, and frac tanks used for highway transport, while clarifying this tax replaces sales/use taxes for commercial vehicles. The bill also allows tax credits for stolen or defective new vehicles within 90 days (theft) or six months (defect). These changes affect all Oklahoma vehicle buyers, sellers, and commercial truck operators, particularly for off-road vehicles and heavy freight equipment.