No commissioner or member of a committee established by the commission who is a nonmember of the commission shall receive a salary. Each commissioner, except ex officio government members, and each member of a committee established by the commission who is a nonmember of the commission may receive a sum of not to exceed one hundred dollars ($100) per day, as established by the commission, for each day spent in actual attendance on, or in traveling to and from, meetings of the commission or committees of the commission, or on special assignment for the commission, as approved by the commission, together with the necessary traveling expenses and meal allowances, as approved by the commission.