Each badge shall be made of metal and shall be conspicuously and consecutively numbered, and no two (2) badges issued by the same person, corporation or City department operating a utility shall bear the same number. Each badge shall bear the name of the person, corporation or City department by which it is issued. Each employee authorized to enter dwellings or buildings shall, while engaged in the discharge of such duty, wear such badge over the left breast of the outer garment, so placed as to be readily seen and examined. Each authorized meter reader, tester or inspector shall also carry with him or her at all times while engaged in the discharge of his or her duties, an identification card bearing the name of the person and company or City department issuing the same. Each card shall state concisely the name, age, height, weight and complexion, as well as the color of hair and eyes of the person carrying the same. The form, style and character of cards and badges shall be approved by the Director of Public Service, but the cards and badges of no two (2) persons or corporations shall be of the same color or design. No card or badge to which such approval has not been given by the Director of Public Service shall be worn by any person.