No payment shall be made on any public improvement, construction, water or sewer contract for any work, labor, or materials not specified therein, except as otherwise provided in this chapter. Whenever it shall be the opinion of the chief procurement officer, that, in order properly to complete such contract, extra work, labor or materials not provided for therein will have to be furnished or alterations will have to be made in the plans or specifications requiring additional expenditures not provided for in such contract, the chief procurement officer shall submit a report in writing to the city council, or place in the contract records on file an explanation setting forth fully what extra work, labor or materials, or alterations in the plans or specifications, are desired, the necessity therefor, and the estimated additional expenditure required for such extras or alterations. All such payments must be pursuant to contract modifications executed in accordance with the provisions of this chapter and of the "Municipal Purchasing Act For Cities of 500,000 or More Population", codified at 65 ILCS 5/8-10-1 et seq., as amended.
No extra work, labor, or materials, or alterations in the plans or specifications which will involve the expenditure of any money over and above the amount fixed as the contract price in and by such contract shall be ordered or authorized by the chief procurement officer, unless the express authority of the city council be first procured for such extras or alterations and for the expenditure of the amount to be paid therefor.
(Prior code § 26-15; Amend Coun. J. 7-19-00, p. 38206, § 1)