(a) The display of video tapes having as a dominant theme specified sexual activity or specified anatomical areas shall be physically separated from all other video tapes and materials in a completely enclosed room subject to the following:
(i) The room shall have only one door for ingress and egress by patrons.
(ii) A sign outside of the room shall indicate that adult videotapes are displayed and shall state that no one under the age of 18 is permitted.
(iii) In lieu of an enclosed room, a catalogue containing a list of all adult- oriented videotapes for rental or sale may be used for over the counter purchases by patrons. This requires that all videotapes be stored behind the sales counter or in a separate, enclosed storage area until rented or purchased.