The executive branch of the city government is created. The office of Mayor is created. The Mayor shall control and direct the executive branch. The Mayor is authorized to delegate executive and administrative power within the executive branch. The Mayor shall be the chief executive officer with all executive and administrative powers of the city and the official head of the city for all ceremonial purposes. The Mayor shall devote full time and attention to the performance of the duties of office and shall hold no other paid public or private employment.