All public contracts executed by the city wherein labor is required, except contracts for the purchase of goods, shall contain the following provisions.
(a) A statement that the contractor will comply with all provisions legally required of contractors on a public contract.
(b) A statement that the contractor will comply with all of the requirements of sections 4.615 to 4.655 of this code.
(c) A statement that, in the event of a willful violation of subsection (a) or (b) of this section, the city will penalize the contractor by debarring the contractor for one year as permitted by state law.
(d) A statement that if a contractor or subcontractor violates the provisions of subsections (a) or (b) of this section, the city manager may terminate the contract. Payment upon termination shall be made by the city according to rules adopted by the city manager.