Code of Federal Regulations Title 40. Protection of Environment § 40.52.150 Yavapai–Apache Reservation

(a) The provisions for prevention of significant deterioration of air quality at 40 CFR 52.21 are applicable to the Yavapai–Apache Reservation, pursuant to § 52.21(a).

(b) In accordance with section 164 of the Clean Air Act and the provisions of 40 CFR 52.21(g), the Yavapai–Apache Indian Reservation is designated as a Class I area for the purposes of preventing significant deterioration of air quality.