SECTION 1. There is hereby created a Merit and Trial Board in the City of Manila which shall be composed of the Mayor as chairman, the Chief of Police as vice-chairman, the Deputy Chief of Police who, in the absence of both the Mayor and the Chief of Police, shall act as chairman, the Inspector of Police, the Director of Traffic, the Chief of Uniformed Police, the Chief of Criminal Reports and Records Division, and the Chief of Detectives, as members, and the administrative officer of the Police Department, as secretary. The Board shall have the following powers and duties:
(a) To consider and pass upon all applications for appointment in the city police force;
(b) To prepare and hold all examinations for applicants to the department, rank promotion within the department, or any special examination that may be deemed necessary for the purpose of reclassification of personnel.
(c) To consider and pass upon all recommendations for promotion in the service;
(d) To consider and accept all resignations;
(e) To act on and pass upon all discharges and dismissals from the service for cause;
(f) To conduct administrative investigations on all charges made against any member of the police department and for this purpose the Board is empowered to issue subpoena against any person requiring him to appear and testify before said Board on any matter therein under investigation; and
(g) From time to time, to issue such rules and regulations calculatedto improve the service or promote the welfare of the members of the police department.