Improvement work shall not be commenced until plans, profiles and details for such work have been approved by the city engineer. Such plans must be approved before the final map is approved. All such plans and profiles shall be drawn on a minimum twenty-four (24) inch by thirty-six (36) inch paper. An estimate of the quantities of improvement work for purposes of determining security agreement requirements shall accompany the plans. (Ord. 2017-01 (part), 2017: Ord. 2013-07, 2013)