"Adult bookstore and/or adult video store"means a commercial establishment which, as one of its principal business purposes, offers for sale or rental for any form of consideration any one or more of the following: books, magazines, periodicals or other printed matter, or photographs, films, motion pictures, video cassettes, compact discs, digital video discs, slides, or other visual representations, which are characterized by their emphasis upon the display of "specified sexual activities" or "specified anatomical areas." A business purpose shall be a principal business purpose if any one of the following applies:
a. A principal portion of the business's displayed merchandise consists of the foregoing enumerated items;
b. A principal portion of the wholesale value of the business's displayed merchandise consists of the foregoing enumerated items;
c. A principal portion of the retail value of the business's displayed merchandise consists of the foregoing enumerated items;
d. A principal portion of the business's revenues derive from the sale or rental for any form of consideration the foregoing enumerated items;
e. A principal portion of the business's interior business space is used for the display, sale, or rental of the foregoing enumerated items;
f. The business regularly features the foregoing enumerated items, and prohibits access by minors, because of age, to the premises, and advertises itself as offering "adult" or "xxx" or "x-rated" or "erotic" or "sexual" or "pornographic" material on signage visible from a public right-of-way.