A. All licenses issued pursuant to the provisions of this chapter shall be kept posted by the licensee in a conspicuous place in his principal place of business in the city, or, if there be no such principal place of business, in such conspicuous public place in said city as the licensee may select.

B. No person to whom a license has been issued, pursuant to this chapter, shall suffer or allow any other person chargeable with a separate license to operate under or display his license nor shall such other person operate under or display such license. (Ord. 129 § 19, 1970).