The requirements of sections 160 through 165 of the Clean Air Act are met except as noted in paragraphs (a) and (b) of this section. The EPA is retaining Sec. 52.21 except paragraph (a)(1) as part of the Nebraska SIP for the following types of sources:
(a) Sources proposing to construct on Indian lands in Nebraska; and,
(b) Enforcement of permits issued by EPA prior to the July 28, 1983, delegation of authority to Nebraska. [49 FR 29599, July 23, 1984, as amended at 68 FR 11323, Mar. 10, 2003; 68 FR 74489, Dec. 24, 2003]