A rezoning petition for a planned commercial zone shall be submitted to the Planning Commission and shall be accompanied by a preliminary development plat for the commercial center, showing a unified and organized arrangement of buildings and structures and their proposed uses, off-street parking, internal and external traffic circulation and service facilities, architectural sketch drawings, landscaping plans and sketches demonstrating the design and character of the proposed development. The developer shall submit all evidence deemed necessary by the City Council and/or Planning Commission of his ability to undertake and complete the proposed project. (PZSC § 03-25-007)