The Buses Utilizing Safety and Environmental Standards Act, or BUSES Act, aims to establish a national minimum idling standard for certain buses. It amends the Clean Air Act to prohibit states and their political subdivisions from implementing or enforcing engine idling restrictions on over-the-road buses and school buses when the engine idles for less than 15 minutes. Furthermore, the bill prevents individuals from initiating citizen suits against bus owners or operators for alleged violations of these specific idling restrictions. It also explicitly bans any state or local government from maintaining or establishing bounty-based enforcement programs that offer monetary compensation to private citizens for reporting bus idling violations, requiring existing programs to be terminated within 180 days of enactment.