The Clean Air Act (CAA) establishes a number of permitting programs designed to carry out the goals of the Act. Some of these programs are directly implemented by EPA through its Regional Offices but most are carried out by states, local agencies and approved tribes.
EPA has set a goal to make Agency permit decisions within six months by 2022. To that end, EPA’s Smart Sectors Program is discovering strategies that result in efficient environmental permitting processes
U.S. Environmental Protection Agency – EPA
See program website for expiration dates.