"Sec. 29. Henceforth, enlisted men of the Armed Forces of the Philippines and Filipinos commissioned or enlisted in the Armed Forces of the United States who retained or reacquired their Philippine citizenship except those discharged for physical disability, who shall have served at least three years and honorably discharged therefrom shall be incorporated in the Reserve Force in the grade in which discharged, and assigned to an organization thereof, subject to annual active duty training in the same manner as any other reservist: Provided, That any other honorably discharged personnel of the United States Armed Forces not otherwise disqualified may be mustered in the Reserve Force: And provided, further, That nothing in this provision shall prevent the dropping from the rolls of the Reserve Force of the name of any person who shall subsequently become not qualified as a reservist."