(a) The requirements of section 169A of the Clean Air Act are not met because the plan does not include approvable procedures for protection of visibility in mandatory Class I Federal areas.

(b) [Reserved]

(c) Montana's November 7, 2017 Progress Report meets the applicable regional haze requirements set forth in §51.308(g) and (h).

[52 FR 45138, Nov. 24, 1987, as amended at 82 FR 3129, Jan. 10 2017; 84 FR 53061, Oct. 4, 2019]


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