80 Ill. Adm. Code 1540.40
Prior Service Credit
Section 1540
Section 1540.40 Prior
Service Credit
a) Prior Service Form
Any member claiming prior service credit shall file at the
Springfield Office of the System a written statement on a form prescribed by
the Board setting forth in detail all service for which he claims credit
rendered prior to the date of establishment of the Retirement System.
b) Verification of Prior Service
Statement of prior service for which credit is claimed shall
be confirmed in writing to the Springfield Office of the System, on a form
prescribed by the Board, by the Retirement System Coordinator appointed in the
Department in which such service was rendered or by some other person employed
in such Department and who is duly authorized by such Retirement System
Coordinator to make such confirmation. The confirmation shall be made from the
records of the Department or other State Agency. If no such records are
available, confirmation of such prior service may be made by affidavit of two
competent persons not a relative of the member who have actual knowledge of the
service claimed to have been rendered by the member.