Section 10
SEC. 10. The construction of said sewer and water-supply systems shall, as far as practicable, be done and the necessary materials purchased by contract or contracts of the city of Manila with private individuals or corporations. Bids for the same shall be advertised for and the contract shall he awarded to the bidder or bidders whose bid or bids shall be deemed most, favorable to the city of Manila by the Municipal Board, except as hereinafter stated: Provided, That the Municipal Board shall have the power to reject any and all bids, and it is, hereby authorized to reject the same and proceed as directed in subdivision (i), section five of Act Numbered Twenty-two, entitled "An Act appropriating one million dollars, in money of the United States, for improving the port of Manila." When the Municipal Board shall decide that public exigency requires the immediate delivery of any article or performance of any service, the article or service required may, with the approval of the Governor-General, be procured by open purchase or hire at the places and in the manner in which articles are usually bought and sold or such services engaged between individuals, provided the price of such article or service does not in any single instance exceed five thousand pesos. The Municipal Board may advertise and contract for the doing of the work required either as a whole or in part as if may deem most advantageous to the public interests.