PRB members and staff shall be reimbursed for any necessary expenses incurred for performing duly authorized PRB business. Expense reimbursement shall be made on an agency-approved Travel Reimbursement form and in accordance with state travel limits. Receipts for hotel, meals (alcoholic beverages are excluded for reimbursement purposes), and commercial transportation expenses must accompany the reimbursement form. In addition, when PRB members perform any proper business of the board, they may receive, per day, a stipend not to exceed the amount listed in A.C.A. 25-16-903, as amended.