Scope of application of System.
Section 4
SEC. 4. Scope of application of System.—Regular membership in the system shall be compulsor upon— All regularly and permanently appointed employee of the Government of the Commonwealth; All regular and permanent employees of the National Assembly; All members of the judiciary; All officers and enlisted men of the Regular Force, Philippine Army; All regular and permanent employees of the Metropolitan Water District; Regular and permanent employees of other Government boards or agencies, except the University of the Philippines and the Government-owned or controlled business corporations; and Those subject to the provisions of Act Numbered Thirty hundred and fifty, as amended, excluding the persons employed to take the place of teachers on maternity or siclt leave, or otherwise employed temporarily: Provided, That any provincial, city or municipal government, or the University of the Philippines or any other corporation owned or controlled by the Government, shall have the option of joining the System, and if it so joins, the membership shall be compulsory upon all its permanent and regular employees, and it shall pay its share of the contribution of three per centum per annum of its employees' basic annual salaries or compensation, plus the extra premiums, if any, due to extra hazards of the member's occupation: Provided, further, That it shall be compulsory for the municipal, city and provincial governments to pay the required government contributions corresponding to the employees now subject to the provisions of Act Numbered Three thousand and fifty, as amended: And provided, finally, That membership shall not include (a) officers or personnel detailed from the Army, the Navy, or the Civil Service of the United States, and (b) employees who are not citizens of the United States or of the Philippines.