(1) All general sessions judges in Class 1, 2 or 3 counties shall devote full time to the duties of such office and shall be prohibited from the practice of law or any other employment which conflicts with the performance of their duties as judge.
(2) General sessions judges in Class 4 through Class 8 counties shall be considered part-time judges and shall not be prohibited from the practice of law or other gainful employment while serving as judge except to the extent the practice or employment constitutes a conflict of interest.
(3) Notwithstanding this section to the contrary, a judge of the general sessions court in any county with a population of not less than eighteen thousand three hundred one (18,301) nor more than eighteen thousand four hundred (18,400), according to the 2010 federal census or any subsequent federal census, upon adoption of a resolution by a two-thirds (2/3) majority vote of the county legislative body, shall devote full time to the duties of such office and shall be prohibited from the practice of law or any other employment which conflicts with the performance of their duties as judge.