Section 21 - Removal, relocation and payment of costs thereof of certain water mains, sewer pipes and other facilities owned by municipalities or public service corporations1. Whenever the commissioner of general services deems it necessary as a result of the construction, reconstruction or maintenance of any state project, to provide for the removal, relocation, replacement, reconstruction or repair of water mains, sewer pipes and other facilities maintained for public use and owned by any municipality or public service corporation, he shall have the power to contract with such municipality or public service corporation for such removal, relocation, replacement, or reconstruction. The expense of such removal, relocation, replacement, reconstruction or repair shall be a proper charge against funds available for the construction, reconstruction or maintenance of such state project, and the work necessary therefor may be performed by contract, or by the use of office of general services forces and equipment and of materials purchased therefor. However, if the commissioner of general services deems it to be in the public interest, he may contract with the municipality or public service corporation, upon such terms as he may deem advantageous to the state; to have such work performed (a) by the employment of the forces and for the use of the equipment of such municipality and by the use of any material on hand or necessary to be purchased by such municipality or public service corporation or (b) by such other method as such commissioner of general services shall approve or (c) by a combination of the methods provided in this section. Any municipality is hereby authorized to enter into such contract for the purposes of this section. Upon the completion and acceptance of the work, such water mains, sewer pipes and other facilities shall be maintained by the municipality or such public service corporation as the case may be.2. In all cases in which the contracts to be let are for the purpose of removal, relocation, replacement, reconstruction or repair of water mains, sewer pipes and any other facilities owned by any municipality or public service corporation, such municipality or public service corporation shall not be required to make the preliminary deposit or to give the certified check upon submitting its proposal, nor to give any bond for the performance of the work, nor shall any advertising for proposals be necessary where such municipality or public service corporation is to perform the work.N.Y. Pub. Bldgs. Law § 21