(a) The Administrator, by authority delegated under section 188(d) of the Clean Air Act, as amended in 1990, extends for one year (until December 31, 1995) the attainment date for the Salt Lake County PM₁₀ nonattainment area. The Administrator, by authority delegated under section 188(d) of the Clean Air Act, as amended in 1990, extends for two years (until December 31, 1996) the attainment date for the Utah County PM₁₀ nonattainment area.

(b) [Reserved]