(40 ILCS 5/20-117) (from Ch. 108 1/2, par. 20-117)
    Sec. 20-117. Vesting of pension credit - Combined pension credit under all participating systems. If the vesting of pension credit in any participating system for a retirement annuity or survivor's annuity is based upon length of service, the combined service under all participating systems shall be considered in establishing such vesting of pension credit.
(Source: Laws 1963, p. 161.)