(b) Any member who ceases employment in covered employment and active participation in this plan and who thereafter becomes reemployed in covered employment may not receive any credited service for any prior withdrawn accumulated contributions from either this plan or the Public Employees Retirement System unless following his or her return to covered employment and active participation in this plan, the member redeposits in the fund the amount of the accumulated contributions withdrawn from previous covered employment, together with interest on the accumulated contributions at the rate determined by the board from the date of withdrawal to the date of redeposit. Upon repayment he or she shall receive the same credit on account of his or her former covered employment as if no refund had been made.

The repayment authorized by this subsection shall be made in a lump sum within 60 months of the emergency medical services officer's reemployment in covered employment or, if later, within 60 months of the effective date of this article.