A. A nude model studio shall not employ any person under the age of 18 years.
B. No person under the age of 18 years may appear seminude or in a state of nudity in or on the premises of a nude model studio. It is a defense to prosecution under this subsection if the person under 18 years was in a rest room not open to public view or visible to any other person.
C. No person may appear in a state of nudity or knowingly allow another to appear in a state of nudity in an area of a nude model studio premises which can be viewed from the public right-of-way.
D. A nude model studio shall not place or permit a bed, sofa or mattress in any room on the premises, except that a sofa may be placed in a reception room open to the public.
E. It is a defense to prosecution under this section that a person appearing in a state of nudity did so in a modeling class operated:
(1) By a proprietary school, licensed by the Commonwealth of Pennsylvania; a college, junior college or university supported entirely by partly by taxation;
(2) By a private college or university which maintains and operates educational programs in which credits are transferable to a college, junior college or university supported entirely or partly by taxation; or
(3) In a structure:
(a) Which has no sign visible from the exterior of the structure and no other advertising that indicates a nude person is available for viewing; and
(b) Where, in order to participate in a class, a student must enroll at least three days in advance of the class; and
(c) Where no more than one nude model is on the premises at any one time.