SECTION 1. Section four of Act Numbered Thirty-one hundred and seventy-three, as amended, is hereby amended to read as follows:
"SEC. 4. Ten years' deduction in salary requisite for granting of pension or retirement pay; reimbursement of sum deducted or retained.—No claim for pension or retirement pay shall be granted to any officer or employee of the Philippine Health Service or his or her legal heirs who fails to have completed ten full years deduction in salary prior to the application therefor: Provided, however, That in this and similar cases the pension or retirement pay otherwise legally recognized may be granted on condition that the officer or employee concerned or his or her legal heirs agrees upon the deduction to be made on his or her pension or retirement pay, in one or more such installments as to fully cover the unpaid deductions in salaries corresponding to ten full years: And provided, further, That in no case shall the deduction thus made be less than the monthly deduction corresponding to the officer's or employee's salary under the provisions of section two of this Act: And provided, finally, That any officer or employee who has died or has been separated from the service for permanent physical incapacity and has been unable to establish his right to pension or retirement under the provisions of this Act shall be entitled to reimbursement of the entire sum deducted or retained from his monthly salary."