Section 4
SEC. 4. The National Government or any of its agencies or entities as well as any local government that had in its service on December thirty-first, one thousand nine hundred forty-one, or immediately prior to Japanese occupation, members who will not convert their insurance pursuant to section one hereof shall pay its corresponding share of the premiums on their compulsory membership insurance for the period from December thirty-first, one thousand nine hundred forty-one, to February twenty-eight, one thousand nine hundred forty-five, within fifteen years from the date of approval of this Act in one single sum or in annual installments, and is hereby required to include in its annual appropriations the sums necessary to pay said share. All premiums due during the period mentioned herein shall bear interest from the date they fall due at four per centum per annum.