If an exhibition does not consist solely of fine art for public display owned by the taxpayer, the Department will apportion the direct costs of owning and exhibiting the fine art based on the percentage that the value of the fine art for public display owned by the taxpayer bears to the value of all the works of art included in the exhibition.
Nev. Admin. Code § 361.036
NRS 360.090, 361.068, 361.186