In the event that a firefighter does not elect to receive a retirement pension provided under Section 4-109.3 from one or more of the pension funds in which the firefighter has credit, he or she shall, upon withdrawal from the last pension fund as defined in Section 4-109.3, be entitled to receive, from each such fund to which he or she has paid additional contributions under this subsection (c) and from which he or she does not receive a refund under Section 4-116, a refund of those contributions without interest.
A refund of total contributions to a particular firefighter pension fund under Section 4-116 shall include any refund of additional contributions paid to that fund under this subsection (c), but a firefighter who accepts a refund from a pension fund under Section 4-116 is thereafter ineligible to receive a pension provided under Section 4-109.3 from that fund. A firefighter who meets the eligibility requirements of Section 4-109.3 may receive a pension under Section 4-109.3 from any pension fund from which the firefighter has not received a refund under Section 4-116 or under this subsection (c).
40 ILCS 5/4-118.1