Members of a juvenile justice commission shall be reimbursed for their actual and necessary expenses incurred in the performance of their duties. Such reimbursement shall be made by the county of appointment or, in lieu of such actual and necessary expenses the board of supervisors may provide that the members of the commission shall be paid not to exceed the sum of twenty-five dollars ($25) per meeting not exceeding two meetings per month. In the case of a regional justice commission, the duty of reimbursement shall be divided among the participating counties in the manner prescribed by agreement of the boards of supervisors.