It is a defense to prosecution under this chapter that a person appearing in a state of nudity did so in a modeling class operated:
A. By a proprietary school licensed by the state of Minnesota; a college, junior college, or university supported entirely or partly by taxation;
B. 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
C. In a structure:
1. 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
2. Where in order to participate in a class a student must enroll at least three (3) days in advance of the class; and
3. Where no more than one nude model is on the premises at any one time. (Ord. 685, sec. 1, 5-21-2001)