The Chief Judge of the District Court, subject to the approval of the Chief Judge of the Court of Appeals, shall designate a District Court judge in each district as the administrative judge for that district. The administrative judge is responsible for the administration, operation, and maintenance of the District Court in that district and for the conduct of the District Court's business. Subject to the approval of the Chief Judge of the District Court, the District Court of any district may be divided into civil, criminal, traffic, or other functional divisions if the work of the District Court requires.