The subdivider shall secure the foregoing improvement agreement in an amount determined by the city engineer to be one hundred percent of the total estimated cost of the improvements and any additional act to be performed by the subdivider under the agreement, plus ten percent contingency, and such additional amounts as the city council may determine necessary to cover the costs, reasonable expenses and fees including reasonable attorneys’ fees which may be incurred by the city in successfully enforcing the agreement. The requirement of the improvement security shall not be waived under any circumstances. (Ord. 1729 § 4 (Exh. A), 2023)