When, in the prosecution of any work, or improvement under contract, it becomes necessary to make alterations or modifications in such contract, such alterations or modifications shall be made only upon the written order of the Mayor. No such order shall be effective until the price to be paid for the work and material, or both, under the altered or modified contract, shall have been agreed upon in writing and signed by the contractor and the Mayor in behalf of the City.
(Amended by electors 11-3-92)