The judicial power shall be vested in a supreme court, district courts of appeal, circuit courts and county courts. No other courts may be established by the state, any political subdivision or any municipality. All appellate decisions must include an explanation of the basis for the decision. The legislature shall, by general law, divide the state into appellate court districts and judicial circuits following county lines. Commissions established by law, or administrative officers or bodies may be granted quasi-judicial power in matters connected with the functions of their offices. The legislature may establish by general law a civil traffic hearing officer system for the purpose of hearing civil traffic infractions. The legislature may, by general law, authorize a military court-martial to be conducted by military judges of the Florida National Guard, with direct appeal of a decision to the District Court of Appeal, First District.