The Federal Clean Air Act requires the U.S. Environmental Protection Agency (EPA) to establish new source performance standards (NSPS) for categories of sources which significantly contribute to air pollution. The NSPS apply to both new sources and to modifications of existing sources of air pollution. The Clean Air Act directly prohibits operation of sources in violation of the NSPS.

Federal air pollution regulations for gas turbines are located in the New Source Performance Standards in the Code of Federal Regulations, Title 40 Part 60 (40 CFR 60); the Federal regulations for gas turbines are in Subpart GG - Standards of Performance for Stationary Gas Turbines.

The sections within this regulation include: 60.330 (Applicability and designation of affected facility), 60.331 (Definitions), 60.332 (Standard for nitrogen oxides), 60.333 (Standard for Sulfur dioxide), 60.334 (Monitoring of operations), and 60.335 (Test methods and procedures).