§ 93. Performance of public work to be certified. All public work
performed pursuant to contract under the supervision or control of the
commissioner shall, before it is accepted, be certified to by him to the
effect that such work has been performed in a good and substantial
manner with the materials required, of the quality and in the manner
directed by the terms of the contract under which the same was done.
Within ten days after the completion of any such work the commissioner
shall file a certificate of such completion with the comptroller and
with the city clerk, to be reported by him to the common council. Such
certificate shall state in substance that said work has been duly
examined by the commissioner and that the same has been fully performed
and completed in accordance with the terms of the contract therefor.