After the rezoning of a site to a CP zone, a final development plat for the entire project, or for the initial phase if a stage development plat has been approved, shall be submitted to and approved by the Planning Commission as complying with the regulations and requirements attached thereto prior to the issuance of any building permits. The final development plat shall show in detail the proposed areas and locations of buildings, off-street parking, internal and external traffic circulation, improvements, landscaping, signs and service facilities. No changes shall be made in the final development plat during the course of construction pursuant thereto without first obtaining approval of the Planning Commission. Copies of the approved final development plat shall be kept on file in the office of the Planning Commission, Building Official and City Recorder, and only changes which may be subsequently approved shall be added thereto. (PZSC § 03-25-010).