YAVAPAI COUNTY PLANNING AND ZONING ORDINANCE Page 77 b. A DRO zone may be created to apply to any or all Use Districts within its zone and to any or all uses within the Use District including, but not limited to the following: single-family residential, multi-family residential, recreational, commercial, industrial, and semi-public uses. c. A DRO zone may establish guidelines or requirements in addition to the general provisions and Use Districts on which it is overlaid. Design guidelines or requirements for a DRO zone may include, but are not limited to architectural style, landscaping, facades and theme treatments, historic preservation considerations; building colors and materials, scenic areas, public facilities, and utilities. d. The content of the design guidelines and requirements (along with other particulars herein described) shall be determined by the owners' of private property within the area proposed for a DRO zone. e. A DRO zone shall include private properties owned by a minimum of three (3) separate owners of record of three (3) separate properties and shall have a minimum size of fifty (50) contiguous acres or shall contain a minimum of fifty (50) legal lots or parcels. f. The geographic area of a DRO zone shall fall entirely within the unincorporated area of Yavapai County and shall constitute one (1) contiguous area. g. A DRO zone shall not geographically overlap any other DRO zone, nor shall there be permitted any "islands" of non-DRO area completely surrounded by a DRO zone. However, a DRO zone may be surrounded by a subsequent DRO zone. h. Public land may be included in the area of a DRO zone, however, the DRO provisions shall not apply to the design, construction, or development of publicly owned and operated facilities. Public agencies are encouraged to voluntarily comply with the guidelines of the DRO zone within which they are developing. Whenever public land is included in the geographic area of a DRO zone, signatures representing public land shall not be counted nor shall the acreage of the public land be included in any calculations of required area. However, wherever public land is included in a DRO zone, and such public land forms the perimeter of the DRO zone, the private land outside the DRO zone within three hundred feet (300’) of the perimeter shall be included for purposes of the "external petitions" required in Subsection 4.e. Whenever public land included in a DRO zone is used for private purposes and/or whenever such land comes into private ownership, the guidelines and requirements of the DRO zone shall become applicable. 3. Nomination Process: a. Nomination: Any group of three (3) or more separate owners of record of three (3) separate properties within Yavapai County may delineate an area containing their properties (and perhaps others) and nominate that area for a possible DRO zone. Nomination of a DRO zone shall be by letter to the Planning and Zoning Commission describing the geographic extent and proposed content of the DRO zone, together with signatures of supporting property owners as well as any local community groups wishing to express support of the DRO zone.