provincial or munici pal government authorizing such works shall make appropriations to pay for the same. 

The Director of Public Works, whenever he shall deem the same to be in the interests of the public service, may place at the disposal of the district engineers, upon proper memorandum receipt, property under his control belonging to the Insular Government,  and shall fix a reasonable charge to pay for the necessary expenses connected therewith and the wear and tear thereon, and said charge shall appear in the statement of the district engineer and shall be paid by the provincial or municipal government inter ested, as hereinafter provided. 

[1401-8; Comp., 1302.] 

SECTION 1139 . Expenses of Work Done by District Engineer . — The district engineer shall submit to the Director of Public Works a statement showing the cost of authorized surveys and investigations made by him and of the superintendence of construction, rep air, and maintenance of public works rendered by him for provinces and municipalities, and such cost shall be chargeable against the province or municipality for which such projects were accomplished, under such rules and regulations as may be jointly prep ared by the Insular-Auditor and the Director of Public Works. It shall be the duty of the provincial or municipal government incurring charges to make appropriations providing for the payment of the same, and moneys so paid shall revert to the general fund s in the Insular Treasury. 

[1401-11; Comp., 1304.] 

The salaries and wages of employees engaged in the prosecution of specific provincial or municipal public works shall be paid by the province or municipality concerned. 

[1401-9; Comp., 1303.] 

SECTION 1140 . Special Assignment of Engineer to Superintend Provincial Construction Work . — Upon the request of the provincial board of any province to which a district engineer is not assigned, the Director of Public Works shall, with the approval of the Secretary of Commerce and Police, assign from the engineering force under his control an engineer to prepare plans and estimates for engineering work desired by such provincial board, or to supervise the construction of engineering work which has been duly a uthorized. In case of such assignment the provisions of the next preceding section with regard to payment of the expense of such service shall apply to the interested province, municipality, or township. 

