A person who has elected under Section 4-108.4 to become an active participant in a firefighter pension fund established under Article 4 of this Code may apply for transfer to that Article 4 fund of his or her creditable service accumulated under this Article for municipal firefighter service. At the time of the transfer, the Fund shall pay to the firefighter pension fund an amount equal to:
Participation in this fund with respect to the transferred credits shall terminate on the date of transfer.
For the purpose of this Section, "municipal firefighter service" means service with the fire department of a participating municipality for which the applicant established creditable service under this Article.
40 ILCS 5/7-139.10