(1) It shall be the responsibility of the subdivider to have a civil engineer registered in the state of Arizona prepare a complete set of improvement plans for construction of water and public sanitary sewer facilities or other approved alternate system and all other required improvements. Such plans shall be based on the approved preliminary plat and be prepared in conjunction with the final plat.

(2) Final construction plans for all improvements shall be approved and signed by the City Engineer before approval of the final plat by the Council.