Section 10C. The general superintendence and administrative authority of the chief justice for administration and management, the chief justices of the respective departments of the trial court and the first justices of particular courts shall not include the authority or power to exercise, supersede, limit, prevent the exercise of or otherwise affect any of the powers, duties and responsibilities of the clerks or registers of probate in any general or special law, including laws authorizing or governing the selection and appointment of personnel, except where expressly authorized.