The provisions of this chapter shall apply to all changes of use, new construction, expansion or alteration of the use of land unless expressly exempted by this chapter. No use shall be established, no structure erected or enlarged, and no other improvement or construction undertaken except as shown upon an approved site plan which is in conformance with the requirements set out in this title. (Ord. 1197 § 61, 2010; Ord. 733 § 1, 1996; Ord. 601 § 1, 1991; Ord. 573 § 2, 1990).