This District comprises the downtown section of the City which is called the B-3 Central Business District. Here are concentrated activities which have primarily a City-wide function; namely large stores offering comparison shoppers' goods, specialty stores, business services, banks, offices, theaters, hotels and government buildings. The use of land is intensive, which is one of the main determinants of the vitality of the B-3 Central Business District. It is the purpose of these regulations to encourage such intensity of use and to exclude activities which have a negative effect upon the proper functioning of the B-3 Central Business District.