A site plan showing the location of the existing and proposed building or buildings and other improvements, the location of all required parking and loading spaces, and all provisions for maneuvering space and access thereto from a public right-of-way including proposed curb cuts, shall be submitted and approved as being convenient and functional prior to the issuance of a building permit. No approval of occupancy shall be issued upon completion of a building or structural alteration of a building or for any land use when no buildings are erected or altered, unless and until all such spaces as required and as shown upon approved plans and made a part of the building permit are in place and ready for use. (Prior gen. code § 8-63.9)