U.S. Code of Federal Regulations
Regulations most recently checked for updates: Jan 21, 2026
(a) An integrated gasification combined cycle electric utility steam generating unit subject to subpart Da of this part is not subject to this subpart.
(b) A stationary combustion turbine used in a combustion turbine test cell/stand, as defined in § 60.4420a, is not subject to this subpart.
(c) If any solid fuel is combusted in the HRSG, the HRSG is not subject to this subpart.
(d) Stationary gas turbines subject to title II of the Clean Air Act are not subject to this subpart.
