The regulations contained in this chapter shall apply to all land within Sierra County except for the land that is within the city limits of any incorporated city. The regulations contained in this chapter shall not apply to land within Sierra County that is also within the boundaries of the Sierra Valley Groundwater Management District and/or land within the boundaries of the Long Valley Groundwater Management District, if either of the respective districts has adopted an ordinance for the regulation of the extraction and export of groundwater within their respective boundaries, that is at least as restrictive as the provisions of this chapter. (Ord. 865, eff. 4/16/98)