The term "Administrator" as it appears in 40 C.F.R. § 52.21 shall mean the Mississippi Environmental Quality Permit Board, except that:
A. In subparagraph (b)(3)(iii) [relating to "net emissions increase"], it shall mean either the Mississippi Environmental Quality Permit Board or the Administrator of the United States Environmental Protection Agency (USEPA).B. In the following subsections, it shall continue to mean the Administrator of the USEPA: (1) (b)(17) [definition of "federally enforceable"];(4) paragraph b(48)(ii)(c);(7) (g)(1) -(g)(6) [Redesignation];(8) (1)(2) [Air quality models];(9) (p)(2) [concerning Federal Land Manager]; and(10) (t) [Disputed permits or redesignations].Miss. Code Ann. §§ 49-2-9 (1)(b), 49-17-17, 49-2-1, et seq. and 49-17-1, et seq.