The provisions of the RZC are declared to be severable. If any provision of the RZC or any code or document adopted by reference herein is for any reason held to be invalid or unconstitutional by any court of competent jurisdiction, such invalidity or unconstitutionality shall not affect the validity or constitutionality of the remaining provisions of the RZC. If any provision of the RZC is adjudged invalid or unconstitutional as applied to a particular property, use, building or other structure, the application of such portion of the RZC to other properties, uses, buildings, or structures shall not be affected.