HB 4576 modifies the operation of certain metropolitan transit authorities. It adjusts tax exemptions for compressed natural gas (CNG) and liquefied natural gas (LNG) fuel supplies used in transit vehicles, allowing exemptions for transit authorities in municipalities with populations under 320,000. The bill also establishes a new process for setting and approving transit fares, requiring a 60-day delay for single-ride base fare changes unless opposed by a metropolitan planning board. Additionally, it regulates insurance broker selection for these transit authorities, requiring board oversight, disclosure of business relationships, and prohibitions on undisclosed financial compensation​.