Members of the commission shall receive no salary, but shall receive compensation not exceeding twenty-five dollars ($25.00) for each day spent in the discharge of their official duties, with a maximum of fifteen hundred dollars ($1500) annually. An official meeting of the commission shall be held by request of the director. The director is authorized and directed to provide the commission with the clerical, legal, and other assistance that shall be necessary to permit the commission to perform its duties as provided in this chapter. The reasonable and necessary traveling and other expenses of the members of the commission while actually engaged in the performance of their duties shall be paid from the state treasury and upon receipt of proper vouchers approved by the director and the chairperson of the commission. The general assembly shall annually appropriate any sum that it deems necessary to carry out the purposes of this section.