Contracts awarded by a district engineer for the construction or repair of provincial public works and improvements of any kind shall be executed on behalf of the provincial government by said engineer, with the approval of the provincial board. EHCaDS Contracts awarded by a district engineer for the construction or repair of public works or improvements undertaken on account of a municipality or other local political division shall be executed by the district engineer, with the approval of the local cou ncil of the political division concerned, if any. SECTION  1146 . Bond to be Given by Contractor . — The officer charged with the duty of awarding a contract for any public work may, under the regulations of the Bureau of Public Works, require the contractor to give an adequate bond to secure the proper accom plishment of the work to be done or to secure not only the proper accomplishment of the work but also the satisfaction of obligations for materials used and labor employed upon the same. SECTION  1147 . Certificate Showing Completion of Work . — No payment, partial or final, shall be made on any public work of construction or repair without a certificate on the voucher therefor to the effect that the work for which payment is contemplated has  been accomplished in accordance with the terms of the contract and has been duly inspected and accepted. Such certificate shall be signed by a duly authorized representative of the Director of Public Works having full knowledge of the facts in the case. [1752-3; Comp., 1300.] SECTION  1148 . Discharge of Bond.  — After the work has been duly accepted by the Government, any bond given by the contractor to secure the proper accomplishment of the work shall be deemed to be discharged and shall be surrendered by the Director of Public  Works; but if by the terms of the bond the obligors are bound to satisfy claims for material and labor, the bond shall not be surrendered until the expiration of two months from the acceptance of the work, and if meanwhile any materialman or laborer shall  give written notice to the Director of Public Works to the effect that he has a just claim against the contractor for materials used or labor employed upon the work, the bond shall not be surrendered until the claim in question shall have been satisfied o r its lack of equity established. Upon any such bond the materialman or laborer, giving notice as above prescribed, shall have a legal right of action for the enforcement of his claim. aIDHET CHAPTER  34 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 344