Be it enacted by the Senate and House of Representatives of the Philippines in Congress assembled:

SECTION 1. Subsection (a) of section two of Commonwealth Act Numbered One hundred eighty-six, otherwise known as the Government Service Insurance Act, as amended, is further amended to read as follows:

"(a) 'Employer' shall mean the National or a local government, an agency, board, or corporation controlled or owned by the Government, and shall include the Philippine Tuberculosis Society. 'Employee' shall mean any Filipino citizen in the service of an 'employer'."

SEC. 2. Subsection (a) of section four of the same Act, as amended, is further amended to read as follows:

"SEC. 4. Scope of application of System.—(a) Membership in the System shall be compulsory upon all regularly and permanently appointed employees, including judges of the Courts of First Instance and those whose tenure of office is fixed or limited by law; upon all teachers except only those who are substitutes; upon all regular employees of the Philippine Tuberculosis Society, and upon all regular officers and enlisted men of the Armed Forces of the Philippines." 

SEC. 3. This Act shall take effect as of June nineteen hundred and fifty-one.

Approved,  June 22, 1957.