Every person to whom a massage establishment license shall have been granted shall display said massage establishment license in a conspicuous place in the massage establishment so that it may be readily seen by persons entering the premises. Every person to whom a manager's, operator's or massage technician's license shall have been granted shall, while in a massage establishment, display in a conspicuous place in the massage establishment said massage technician license or operator or manager license. A copy of the Massage Establishment Ordinance shall be displayed in a conspicuous place in the massage establishment so that it may be readily seen and read by persons entering the premises and employees of the establishment.