It shall be the duty of the City Engineer to prepare a master plan of water and sewer works for the City, including the source of water supply, reservoirs, disposal works and master distribution and collection lines. The Planning Commission shall then review such master plan and shall certify it to the City Council, together with recommendations and comments. After it has received the advice and recommendation of the Planning Commission, the City Council shall review such master plan making any corrections or additions thereto which it deems appropriate. Failure on the part of the Planning Commission to certify the master plan to the City Council within thirty days from the date received from the City Engineer shall be deemed to mean approval unless a longer time is granted by the City Council. The master plan may be prepared in whole or in part, but each part shall be similarly referred to the Planning Commission for its review and recommendations. No material change to the master plan shall be made unless submitted to the Planning Commission for its review, and no change shall be made unless voted upon and approved by not less than a majority of the entire membership of the City Council. (Prior code § 26-44)