Each nonstudent member of the Harford County Board is entitled to receive $3,600 annually for travel and other expenses related to the performance of duties as a member of the board. Payments to a nonstudent member for the expenses described in subsection (a) of this section shall be paid in 12 equal monthly installments. Subject to the approval of the board, a nonstudent member may be reimbursed for additional travel and other expenses.