Mountainous planning district

(1) (a) The legislative body of a county of the first class may adopt an ordinance designating an area located within the county as a mountainous planning district if the legislative body determines that: (i) the area is primarily used for recreational purposes, including canyons, foothills, ski resorts, wilderness areas, lakes and reservoirs, campgrounds, or picnic areas within the Wasatch Range; (ii) the area is used by residents of the county who live inside and outside the limits of a municipality; (iii) the total resident population in the proposed mountainous planning district is equal to or less than 5% of the population of the county; (iv) the area is within the unincorporated area of the county or was within the unincorporated area of the county before May 12, 2015; and (v) the area includes land designated as part of a national forest on or before May 9, 2017. (b) The population figure under Subsection (1)(a)(iii) shall be derived from a population estimate by the Utah Population Committee created in Section 63C-20-103. (2) (a) A county may adopt a general plan and adopt a zoning or subdivision ordinance for a property that is located within a mountainous planning district. (b) A county plan or zoning or subdivision ordinance governs a property described in Subsection (2)(a).