(a) When it becomes necessary to make changes in the plans or specifications after performance of a contract for public works has been commenced, or it becomes necessary to decrease or increase the quantity of work to be performed, such change, alteration, or modification shall be made only when a change order therefor is authorized by the City Council upon the written recommendation of the city manager. Provided, however, that the City Council may by ordinance establish rules by which a change order may be executed by the city manager without the requirement of City Council authorization.
(b) No such change, alteration or modification of a contract shall be valid unless the price to be paid for the work has been agreed upon in writing and signed by the contractor and the city manager upon authorization of the City Council, where required.
(c) The total contract price shall not be increased unless due provision has been made to provide for the payment of such added cost by appropriating available funds for that purpose.
(Ord. 10272, § I(VII), 3-16-1989, approved 5-6-1989)