“A musician who wants to go abroad and whose instrument contains ivory needs to obtain a CITES musical-instrument certificate, or ‘passport.’ To do that, the musician must provide proof that the African elephant that yielded the ivory used in the instrument was “removed from the wild” before Feb. 26, 1976, the date African elephants were listed in one of the three CITES appendixes. Depending on the pedigree of the musical instrument, it may be possible to obtain a date of manufacture from the maker. But often, it is not.”