His specialty is depicting female nudes in the natural environment. Levingston's photographs have been exhibited at shows, institutes and galleries around the world, and he has published them in a book, " The Figure in Nature." Levingston does not comply with Sections 2257 and 2257A, and he does not believe he is capable of doing so. He stated the record-maintenance requirements are " incomprehensible" to him, and the need to be available for inspection 20 hours a week would undermine his ability to go on photo shoots. (Audio File 6/5/13 A.M. at 1:42-2:06) (ECF 201).