Sales tax: distribution; disposition of money to the comprehensive transportation fund; modify. Amends sec. 25 of 1933 PA 167 (MCL 205.75).

HB 4210 amends Michigan's sales tax distribution rules to adjust funding for the Comprehensive Transportation Fund. It changes the percentage of sales tax revenue from car-related purchases (fuels, vehicles, parts/accessories sold by dealers/gas stations) allocated to this fund: 27.9% until September 2025, 60% for fiscal year 2025-2026, then 25% annually starting October 2026. The bill also maintains existing allocations for school aid (60%), city revenue sharing (15%), and specifies that 35% of aviation fuel tax revenue goes to the State Aeronautics Fund while 65% funds qualified airports. These changes directly affect businesses selling vehicles, fuel, and parts, and govern how transportation funding is structured.