recommendation of the Director shall be consistent with the following fundamental of requirements: [1698-3 ( b ).] [1698-3 ( i ).] [1698-3 ( e ).] ( a ) So far as feasible open competitive entrance examinations shall always be required and given, though appointments to positions requiring technical, professional, or scientific knowledge may, in the discretion of the Director, be made upon either compet itive or noncompetitive examinations. ( b ) Promotion examinations, competitive or noncompetitive, shall be prescribed when practicable. ( c ) thorough physical examination by a competent physician shall be required of every applicant for examination in the United States, and in the discretion of the Director of Civil Service, the same may be required of applicants for examination in the Ph ilippine Islands. Persons found to be physically disqualified for efficient service shall be rejected. AIDTHC ( d ) period of trial service shall be required before appointment or employment is made permanent. [1698-3 ( h ).] SECTION  700 . Authority of Officers and Examiners to Administer Oaths and Take Testimony.  — Officers and examiners of the Bureau of Civil Service may administer such oaths as may be necessary in the transaction of official business, and the Director or othe r person conducting any investigation authorized by him may administer oaths and take testimony in connection therewith. [See 1698-2 ( e ).] SECTION  701 . Duty of Officers to Aid Enforcement of Law.  — All officers in the Philippine civil service shall aid in all proper ways in carrying the Civil Service Law and the civil-service rules into due effect. EHSADc [1698-2  (f) .] SECTION  702 . Publication of Official Roster.  — From the records kept 216 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011