Section 13
SEC. 13. The provincial board may, if it deems such a course advisable, cause all able-bodied male prisoners, except such as are held awaiting trial, to work upon any of the public provincial roads or highways or other public works in the province where such prisoners are confined. Such work shall be done under the direction and control of the provincial supervisor, and while so employed the prisoners shall be sufficiently and properly guarded by the jailor or his deputies or by the Philippines Constabulary if available for that purpose.