40 CFR §52.32

For purposes of the SIP revisions required by § 51.120, EPA may make a finding under section 179(a) (1)-(4) of the Clean Air Act, 42 U.S.C. 7509(a) (1)-(4), starting the sanctions process set forth in section 179(a) of the Clean Air Act. Any such finding will be deemed a finding under § 52.31(c) and sanctions will be imposed in accordance with the order of sanctions and the terms for such sanctions established in § 52.31.