The ever watchful Norman Lebrecht (Follow him on FB:Facebook and on Twitter@NLebrecht) of Slipped Disc has found more bad news for musicians wanting to enter the USA:
A federal regulation on ivory imports came into force on February 25. It applies to ivory used in musical instruments.
Worked African elephant ivory imported as part of a musical instrument will continue to be allowed provided the worked ivory was legally acquired prior to February 26, 1976; the worked elephant ivory has not subsequently been transferred from one person to another person in pursuit of financial gain or profit; and the item is accompanied by a valid CITES musical instrument passport.
What this means is that every string player who has a small piece of ivory in their bow will need to get a passport for each instrument and bow. Every time you buy a new bow, you will need to register it and pay a $75 fee.