Every person to whom a model studio license shall have been granted shall display said license in a conspicuous place in the model studio so that it may be readily seen by persons entering the premises. Every person to whom a manager's or operator's license shall have been granted shall, while in the model studio, display in a conspicuous place in the model studio said operator's or manager's license. A copy of the model studio ordinance, consisting of Division 23 of Subtitle 5 of the Prince George's County Code, shall be displayed in a conspicuous place in the model studio so that it may be readily seen and read by persons entering the premises and employees of the model studio. A sign shall be posted in a conspicuous place visible from the main entrance of the model studio containing the following message in letters of at least one and one-half (1 1/2) inches in height and a corresponding width: "PATRONS ARE PROHIBITED FROM DISROBING ON PREMISES."