U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
(a)-(c) [Reserved]
(d) The requirements of § 51.230(d) of this chapter are not met since statutory authority to prevent construction, modification, or operation of a facility, building, structure, or installation, or combination thereof, which indirectly results or may result in emissions of any air pollutant at any location which will prevent the maintenance of a national air quality standard is not adequate.