Section 12B. In any city or town which accepts the provisions of this section, no licensee, licensed under the provisions of section twelve, shall suffer or permit any person to appear on said licensed premises in any manner or attire as to expose to public view any portion of the pubic area, anus, vulva or genitals, or any simulation thereof, or shall suffer or permit any female to appear on licensed premises in such manner or attire as to expose to view any portion of the breast below the top of the areola, or any simulation thereof. Any violation of the provisions of this section shall be enforced by the alcoholic beverage control commission and the local authorities.