Source
40 CFR § 97.402
Scoping language
The terms used in this subpart shall have the meanings set forth in this section as follows, provided that any term that includes the acronym CSAPR shall be considered synonymous with a term that is used in a SIP revision approved by the Administrator under 52.38 or 52.39 of this chapter and that is substantively identical except for the inclusion of the acronym TR in place of the acronym CSAPR: