A county board that enters into a truancy program agreement with the circuit court of the county that (1) provides for the referral of truant juveniles for supervision by the court’s probation office pursuant to § 49-4-711 of this code and (2) requires the county board to pay for the costs of the probation officer or officers assigned to supervise truant juveniles, shall be reimbursed for one half of the costs of the probation officer or officers, subject to appropriation of the Legislature for this purpose to the West Virginia Department of Education. For any year in which the funds appropriated are insufficient to cover the reimbursement costs, the county’s costs shall be reimbursed pro rata.