Each member of the Commission shall receive the sum of $1,000.00 per year as remuneration for service to the city. The Mayor shall receive an additional $1,000.00 per year. These sums shall be payable in equal monthly installments and shall constitute the only salary or remuneration which a member of the Commission shall receive for service to the city. Members of the Commission may be reimbursed for expenses incurred in the performance of their duties on behalf of the city.