40 ILCS 5/8-178.1
Every employee who, on December 31, 1965, was a contributor and participant in the fund in operation in the city on such date created under and by virtue of the Public Library Employes' Pension Act shall receive credit as follows:
For service prior to January 1, 1966, a city contribution for age and service annuity purposes, of an amount equal to the amount which would have accumulated to his credit from city contributions for age and service annuity to such date, including interest at the effective rate, had he been a participant and contributor during all of his service prior to such date; and, if a present employee in service on the effective date, a city contribution for prior service annuity equal to the amount otherwise provided for present employees as a city contribution for prior service.
Each such employee shall also be credited on such date with the then accumulated amounts, including any interest credited thereon, resulting from contributions made by him and applied to such Public Library Employes' Pension Fund, and such amounts shall be treated as salary deductions.
40 ILCS 5/8-178.1