Nothing contained in this chapter shall require any change in plans, construction, alteration, or designated use of a structure specified in a complete application for a Clallam County development permit submitted prior to the adoption of this chapter. Improvements and uses authorized by a signed document of the Board of County Commissioners recorded motion or resolution of the Board of County Commissioners, or any permit issued by the County or the State of Washington prior to the effective date of this title may be developed as set forth in said permit without this title. If said permit becomes invalid prior to development of said improvements or uses, the provisions of this title shall then be in full force and effect on the subject property.