There is hereby established a committee on aging. The governor shall appoint each committee member for a term of three years, staggered so that the terms of one-third of the members of the committee expire July first of each year, except that initial appointments to the committee must be made on the basis of a one-year term for one-third of the members of the     committee; a two-year term for one-third of the members of the committee; and a full three-year term for the remaining members of the committee. A vacancy occurring other than by reason of the expiration of a term must be filled in the same manner as original appointments, except that the appointment may be made for only the remainder of the unexpired term. The members must be paid for mileage and actual expenses incurred in attending meetings and in performance of their official duties in amounts provided by law for other state officers.