Subsequent to certification as provided for by Section 21-11-8, no change shall be made in the improvement plans for the subdivision without prior approval of the city engineer. All changes approved by the city engineer shall comply with the requirements of this code. Each request for approval of a change in the improvement plans shall be accompanied by the required fee prescribed by city council resolution. The city engineer may issue a stop work notice for any work that does not comply, or in order to evaluate whether certain work complies, with the approved improvement plans. (Ord. No. 1500, § 3 (part).)