Federally enforceable
Federally enforceable means all limits and conditions the Administrator can enforce (including the requirements of 40 CFR parts 60, 61, and 63), requirements in a State's implementation plan, and any permit requirements established under 40 CFR 52.21 or under 40 CFR 51.18 and 40 CFR 51.24.
Source
40 CFR § 60.1940
Scoping language
Terms used but not defined in this section are defined in the CAA and in subparts A and B of this part.