AN ACT TO INCLUDE WITHIN THE COVERAGE OF THE GOVERNMENT SERVICE INSURANCE SYSTEM THOSE ELECTIVE AND APPOINTIVE OFFICIALS WHO DO NOT RECEIVE ANY BASIC PAY OR SALARY BUT WHO ARE PAID ONLY ON PER DIEMS BASIS, AMENDING FOR THE PURPOSE SECTIONS TWO AND TEN OF PRESIDENTIAL DECREE NUMBERED ELEVEN HUNDRED FORTY-SIX, OTHERWISE KNOWN AS THE REVISED GOVERNMENT SERVICE INSURANCE ACT OF 1977, AS AMENDED