Section 40 ILCS 5/16-131.3 - Transfer of creditable service to Article 8, 9 or 13 fund(a) Any city officer as defined in Section 8-243.2 of this Code, any county officer elected by vote of the people who is a participant in the pension fund established under Article 9 of this Code, and any elected sanitary district commissioner who is a participant in a pension fund established under Article 13 of this Code, may apply for transfer of his or her contributions and creditable service accumulated under this System to such Article 8, 9 or 13 fund. Such creditable service shall be transferred forthwith. Payment by this System to the Article 8, 9 or 13 fund shall be made at the same time and shall consist of: (1) the amounts credited to the member through member contributions, including interest if applicable, as of the date of transfer, but excluding any additional or optional contributions, which shall be refunded to the member; and(2) employer contributions equal in amount to the accumulated member contributions as determined in item (1) above. Participation in this system shall terminate on the date of transfer.
(b) Any such elected city officer, county officer or sanitary district commissioner who has creditable service under the System may establish additional creditable service for periods during which he or she could have elected to participate but did not so elect. Creditable service may be established by payment to the System of an amount equal to the contributions that would have been made if the person had elected to participate, plus interest at the rate specified under subsection (a) of Section 16-128 to the date of payment.(c) Any such elected city officer, county officer or sanitary district commissioner may reinstate creditable service terminated upon receipt of a refund, by payment to the System of the amount of the refund, together with interest at the rate specified under subsection (a) of Section 16-128 to the date of payment.