Section 6. County officers. The legislature by general and uniform laws shall, commencing with the general election in 1986, provide for the election biennially, in each of the several counties of the state, of county commissioners and for the election of a sheriff, a county assessor, a county coroner and a county treasurer, who is ex-officio public administrator, every four years in each of the several counties of the state. All taxes shall be collected by the officer or officers designated by law. The clerk of the district court shall be ex-officio auditor and recorder. No other county offices shall be established, but the legislature by general and uniform laws shall provide for such township, precinct and municipal officers as public convenience may require, and shall prescribe their duties, and fix their terms of office. The legislature shall provide for the strict accountability of county, township, precinct and municipal officers for all fees which may be collected by them, and for all public and municipal moneys which may be paid to them, or officially come into their possession. The county commissioners may employ counsel when necessary. The sheriff, county assessor, county treasurer, and ex-officio tax collector, auditor and recorder and clerk of the district court shall be empowered by the county commissioners to appoint such deputies and clerical assistants as the business of their office may require, said deputies and clerical assistants to receive such compensation as may be fixed by the county commissioners.