When the Planning Commission makes a recommendation to Council for a change in, or addition to, any ordinance or building code, Council shall study each such recommendation and take action within thirty (30) days by placing on its first reading an ordinance properly covering such recommendation. Final action by Council on such ordinance shall be taken by placing said ordinance on its third and final reading no later than ninety (90) days after its first reading. No resolution, ordinance, regulation, measure or order of Council which violates, differs from or departs from the plan or recommendation submitted by the Planning Commission, shall take effect unless enacted or approved by not less than the affirmative vote of five (5) or more of the members of Council.