(40 ILCS 5/15-130) (from Ch. 108 1/2, par. 15-130)
    Sec. 15-130. Parent. "Parent": The mother or father of a participant or annuitant, a stepparent of a participant or an annuitant by a marriage contracted before the participant or annuitant attained age 16, or an adopting parent by whom the participant or annuitant was adopted before he or she reached age 16.
(Source: P.A. 83-1440.)