Each member of the unified district board shall, upon the adoption of a resolution by the unified district board, receive the actual and necessary expenses incurred in the performance of his or her duties, plus a compensation of one hundred dollars ($100) for each day attending the meetings of the unified district board or any committee of the unified district board or, upon authorization by the unified district board, while engaged in official business of the unified district, but that compensation shall not exceed three thousand six hundred dollars ($3,600) in any one year.