The 2003 amendment to O.C.G.A. § 34-9-203, effective July 1, 2003, added paragraph (c)(4), imposing a one year limitation period on the filing of reimbursement claims. While this amendment imposed a one year filing limitation on all of the employee’s medical expenses incurred after July 1, 2003, it did not affect those expenses incurred prior to that date. O.C.G.A. § 34-9-203 will not be applied retroactively to pre-2003 claims. Therefore, any medical expenses or reimbursement claims incurred prior to July 1, 2003 are not subject to the one year limitation.