Municipality credits computed and credited under Article 8 for all firemen who (1) accumulated service credit in the Article 8 fund for service as a paramedic, (2) have terminated that Article 8 service credit and received a refund of contributions, and (3) are participants in this Article 6 fund on the effective date of this amendatory Act of the 96th General Assembly shall be transferred by the Article 8 fund to this Fund, together with interest at the actuarially assumed rate, compounded annually, to the date of the transfer, as provided in Section 8-172.1 of this Code. These city contributions shall be credited to the individual fireman only if he or she pays for prior service as a paramedic in full to this Fund.