(50 ILCS 120/4) (from Ch. 24 1/2, par. 153)
    Sec. 4. The following words and terms used in this Act shall have the meaning hereby assigned to them, respectively:
    "Employe": any officer or person holding a position in the service of a municipal corporation at the time he enlists or is inducted in the land or naval forces of the United States or ordered to active duty in the military or naval forces of the State of Illinois.
    "Municipal corporation": any county, city, village, incorporated town, township, school district, board of education, park district, forest preserve district, sanitary district, or other municipal body or local governmental agency of the State.
    "Officers affected or concerned": any officer of any municipal corporation or officer administering a pension fund.
    "Pension fund": any pension fund, annuity and benefit fund, annuity and retirement fund, and any fund having for its purpose the payment of retirement or disability benefits, either or both, in operation by force of law or pursuant to legislative enactment, or by virtue of ordinance of a municipal corporation.
    "Pension fund trustees": any board of trustees, retirement board or officers administering a pension fund.
(Source: Laws 1943, vol. 1, p. 445.)