Federal Fleet Operation Regulations
Federal fleets based in Arizona that operate primarily in counties with a population of more than 1.2 million people must be comprised of at least 90% alternative fuel vehicles. Alternatively, federal fleets may meet acquisition requirements through alternative fuel use or apply for waivers. For the purpose of these requirements, alternative fuels include propane, natural gas, electricity, hydrogen, qualified diesel fuel substitutes, and a blend of hydrogen with propane or natural gas.
(Reference Arizona Revised Statutes 1-215 and 49-573)