Any property owner owning contiguous parcels which have not been merged may apply to the City to merge the parcels, and revert them to undivided acreage. Likewise, if a determination is made that the improvements required under a final map or parcel map which has been recorded have not been made for a period of two years, the City may initiate a reversion to acreage of the lots contained within the boundaries of said map. The procedures shall be the same as set forth in Chapter 18.28 for a record of survey map, requiring approval by the Planning Commission. Sections 66499.11 through 66499.20 3/4 of the Subdivision Map Act provide specific requirements for reversion to acreage of subdivision maps and parcels of land. (Ord. 89-2 § 2, 1989.)