This bill extends the Clean School Bus Program, a federal initiative that helps school districts purchase or retrofit buses with clean energy technology, for an additional five years. The program currently operates through 2026, and this legislation would reauthorize it to continue through 2031. The bill affects school districts nationwide that participate in the program by providing them continued access to federal funding for converting their bus fleets to cleaner fuels or electric vehicles. No new funding amounts are specified in the bill text, as it simply extends the existing program's authorization period. The reauthorization allows states and school districts to plan long-term investments in reducing emissions from school transportation.