SEC. 8. An officer of the Regular Force separated from the service by the President on recommendation of Classification or Efficiency Boards for causes not due to his own misconduct, willful failure, the intemperate use of drugs or alcoholic liquor, or vicious or immoral habits, shall—
(a) If on the date of separation he has completed less than three years of active service, be honorably discharged in the grade then held;
(b) If on the date of separation he has completed three or more but less than ten years of active service, be honorably discharged in the grade then held with separation pay equal to three months' base and longevity pay computed upon such grade;
(c) If on the date of separation he has completed ten or more but less than twenty years of active service, be honorably discharged in the grade then held, with separation pay equal to one months base and longevity pay for each year of active service computed upon such grade;
(d) If on the date due for separation he has completed twenty or more years of active service, be retired in the grade then held, under sections one and two of this Act.
Provided, That any officer or enlisted man of the Armed Forces of the Philippines who is separated from the active service for physical disability not due to his own misconduct, willful failure, the intemperate use of drugs or alcoholic liquor, or vicious or immoral habits, shall be placed in the retired list and shall receive either—(a) a gratuity, payable in one lump sum, equivalent to one months base and longevity pay multiplied by the years of active service rendered, but which shall not, in any case, be less than three months base and longevity pay, or (b) an annual retirement pay equivalent to two and one-half per cent of the annual base and longevity pay received by him on date of retirement for each year's active service rendered but not exceeding seventy-five per cent of the total base and longevity pay received by him on the date of retirement, such retirement pay to be paid in equal monthly installments.