Compensation of each county officer shall be fixed by the Quorum Court within a minimum and maximum to be determined by law. Compensation may not be decreased during a current term; provided, however, during the interim, from the date of adoption of this Amendment until the first day of the next succeeding month following the date of approval of salaries by the Quorum Court, salaries of county officials shall be determined by law. Fees of the office shall not be the basis of compensation for officers or employees of county offices. Per diem compensation for members of the Quorum Court shall be fixed by law.