There is created a commission composed of the chief justice of the supreme court, who shall serve as chair, the presiding judge of the court of appeals or the presiding judge’s designee, the presiding judge of the court of criminal appeals or the presiding judge’s designee, the administrative director of the courts, the clerk of the supreme court, and one (1) other member from the supreme court to be elected by the membership of the supreme court, which commission is vested with authority and jurisdiction to supervise and control the court and office building at Knoxville, and to employ all necessary assistants and help for the building, and make necessary contracts therefor.