( m ) Perform such other executive duties as may be prescribed by law or be required of him by ordinance or resolution of the Board. [See 1963-5, 6.] SECTION  2408 . Bids for Work Costing Over One Thousand Pesos . — Before entering upon any work or public improvement the total expense whereof shall exceed the sum of one thousand pesos, the mayor shall advertise for sealed bids or proposals for the same in  two daily newspapers published in Manila, one printed in English and the other in Spanish, for a period of one week, the first insertion to be not less than ten days before the day fixed for opening such proposals. A plan or profile of the work to be done,  accompanied by specifications for the performance of the same, shall, before advertisement, be placed on file in the office of the mayor, or the department of the city government having charge of the work, which plan, profile, and specifications shall, at  all proper times, be open for public inspection. All bids shall be opened in the presence of the Mayor at the advertised time and place. Each bid shall be accompanied by a deposit, the amount and character of which shall be fixed by the mayor and named in the advertisement, and which shall not exceed ten per centum of the estimated cost of the improvement or work to be done where the estimated cost exceeds two thousand pesos, nor be less than two hundred pesos in any case. Such deposit shall be forfeited t o the city if the bidder shall neglect or refuse to enter into a contract, with approved sureties, to execute the work for the price mentioned in his bid and according to the plans and specifications, in case the contract shall be awarded to him. Should al l bids be rejected, or should it become necessary for any reason to call for new bids, subsequent advertisements shall be for a period of five days before the proposals are opened, and in the manner above prescribed. [183-30.] S ECTION  2409 . Contracts in Excess of One Thousand Pesos . — Except as hereinafter provided, every contract exceeding in amount the sum of one thousand pesos, for work, materials, or supplies, shall be let by the mayor to the lowest responsible bidder. The m ayor may reject any and all bids, and if such bids are too high, may purchase the material, hire the laborers and supervise the work. In cases of emergency the Board may authorize the Mayor to undertake by administration the necessary work, or have it perf ormed by contract without advertising for bids. Bonds, to be approved by the mayor, shall be taken for the faithful performance of all contracts. Contracts shall be executed in triplicate by the mayor and by the contractor, and one original shall be filed in t he office of the mayor and one in the office of the Insular Auditor, and the third shall be given to the contractor. Every contract for a sum greater than one thousand pesos shall be Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 711