The building official of the city shall be appointed by the city council and shall have the powers and duties prescribed for the building official by the city building code; provided, that his powers and duties may be exercised by his authorized representatives under his supervision and control. The term "building inspector", whenever used in the ordinances of the city, means the building official. The terms "electrical inspector", "plumbing inspector", and "gas inspector", wherever used in the ordinances of the city, also each refer to and mean the building official, unless a separate electrical inspector, plumbing inspector, or gas inspector is appointed by the city council. (2015 Code § 5-104)