Section 22
SEC. 22. The person now employed in the civil service of the Philippine Islands whose positions may be classified by the operation of this Act and the rules herein provided for shall, unless dismissed by proper authority, continue in the service and discharge the duties assigned them: Provided, That the Board may, in its discretion, require by rule that all such employees shall pass examinations practically adapted to show their fitness to fill the positions now held by them, and that in case of failure to pass such examinations to the satisfaction of the Board, they shall be dismissed from the service.