isability Rules
Most states have chosen not to follow the federal example with regard to judges and have either imposed a constitutional retirement age, as in the case of Colorado, where Colorado Constitution, Article IV, Section 23(1) requires judges to retire at age 72, and/or have a commission overseeing judges (and sometimes other civil servants) that can require them to retire due to disabilities which often arise from old age.
Term limits, which are common at the state and local government level, also often impose de facto age limits, because most very elderly elected officials mandated to be so old by being re-elected many times after being first elected at a much younger age. Term limits limit the extent to which this can happen.