; or (2) sell or barter, offer to sell or barter, purchase, possess, transport, deliver, or receive, in interstate or foreign commerce, bear viscera or any bear viscera product. (b) Exception for wildlife law enforcement purposes A person described in section 4(5)(B) may carry out an activity prohibited under subsection (a) if such activity is— (1) solely for the purpose of enforcing a law relating to the protection of wildlife