The identification and classification of all principal uses of land or buildings permitted in the various zoning districts are grouped into use categories, which are described in chapter 4 of this title and listed for each zoning district in sections 11-6-2, 11-7-2, 11-8-2, and 11-9-2 of this title. The specific uses included in each use category are listed in tables entitled "Uses Permitted" according to the corresponding standard industrial classification (SIC) numbers from the "Standard Industrial Classification Manual (1972)", prepared by the statistical policy division of the office of management and budget, executive office of the president, and available from the superintendent of documents, U.S. government printing office. An SIC number listed and followed by an asterisk is not contained in the SIC manual but is established only for this title. Some SIC numbers have been divided for the purpose of establishing special uses for certain categories and shall be interpreted as such. A use specifically listed in a use category shall not by interpretation be included as a principal use within any other category. It shall be the duty of the building official to classify any use not specifically listed for the purpose of designating the zoning districts in which such use may be located. (Ord. 5916, 8-9-1999)