496, the head of the department issuing the proposals shall publicly open and read all estimates which he may have received for the contract mentioned in such proposals, and shall reject all estimates which are not furnished in conformity with sections 497, 498, 499 and 500; and shall thereupon award the contract to the lowest bidder, or if he shall decline or shall not execute the contract, to the next lowest bidder, and so on until the same shall be executed. § 502. When proposals are issued for a contract to furnish oil, stationery, fuel, or any other article of which a sample can conveniently be furnished, the head of the department issuing the same may require that such sample be delivered at his office, or at the office of the head of the appropriate bureau in his department, within such time before the opening of the estimates, as he may prescribe; and if it be not so furnished, or do not conform to the quality required by the proposals, the estimate delivered by the person furnishing or omitting to furnish the same, as the case may be, shall be rejected. § 503. In all contracts for work for the Corporation, where provision is made for the payment of the contract price by instalments, a provision shall be inserted that the contractor shall allow ten per cent. of the contract price of the work actually done, to remain as security, till the whole work shall be completed according to the contract. § 504. In all contracts for work for the Corporation, provision shall be made that evidence, satisfactory to the head of the appropriate department, that all persons who have performed work, or furnished materials for the performance of the contract, have been fully paid therefor, according to their respective agreements with the contractor, shall be furnished before the last instalment due on the contract shall be paid; or if they have not been paid, that security, satisfactory to the head of the department, shall be given by the contractor, that all such demands for work or materials shall be paid within ten days after the payment of the last instalment. § 505. In all contracts for work for the Corporation, upon any public building, or in any public street or place, in the performance of which accidents or injuries may happen to the person or property of another, a provision shall be inserted, that the contractor shall place proper guards for the prevention of accidents, and shall put up and keep at night suitable and sufficient lights during the performance of the work, and that he will indemnify the Corporation for any damages or costs to which they may be put by reason of injury to the person or property of another, resulting from negligence or carelessness in the performance of the work. § 506. Every contract for supplies or work for the Corporation, shall be executed by the contractor, and shall be accompanied by a bond in the penalty mentioned in the proposals therefor, executed by the persons consenting to become bound as sureties, as provided in section 499, conditioned for the faithful performance of the contract, and of every provision therein contained. 507. Until the Common Council shall otherwise provide by ordinance, the ordinances and resolutions now in force, shall be applicable to the public printing. To enable the Common Council, however, to revise the same, and to make such provision in respect thereto as the public interests may require, the Comptroller and the Counsel to the Corporation are hereby directed to report thereon to the Common Council, on or before the first day of July next, with the draft of an ordinance adapted to carry the same into effect. § 508. Nothing contained in this ordinance shall be construed to affect or impair any contract now in force, or to prevent the execution of any contract for which proposals have been already issued or estimates received, or the execution of which is imposed by the laws of this state upon the Corporation or any officer thereof, in any other manner than is prescribed in this ordinance. § 509. All ordinances and resolutions of the Common Council inconsistent with this ordinance, are repealed; but this repeal shall not affect any act done, or right accrued, under any ordinance or resolution hereby repealed.. § 510. This ordinance shall take effect immediately. |