No improvement, any part of the cost of which is to be assessed to a special assessment district, shall be made until the Council shall have first advertised for proposals for making such improvement and received and opened the same. The City Council may reject any or all such proposals and may at its discretion make such improvement by the proper officials and agents of the City; provided, that any contract for the improvement shall be awarded to the lowest responsible bidder.
(Ord. 2542, passed 1-26-1976; Ord. 2716, passed 7-9-1979)