The Association of Applied Paleontological Sciences has a website that seems to track individual state laws regarding ivory. The definition of what comprises "ivory" has been expanded to an otherwise ridiculous extent (if it were not for its state of origin) in California.
http://www.aaps-journal.org/Fossil-I...gislation.html
Governments have gotten way out of hand.
The firearms restrictions mentioned by Alan are in effect to some degree even in firearm-friendly USA, notably in CA, NY, NJ, MA and MD, which states are noteworthy in their crusade against ivory ownership. Elsewhere, as forces of PC activism have managed to roil the waters regarding police maintenance of social order, restrictions have been eased by a remarkable extent, as the populace acts to take up arms while it is still possible to do so. This gives me hope that the pendulum is swinging back toward a more rational worldview overall. It may take a generation or so to do so, of course.
Meanwhile, hold your politically incorrect antique artifacts closely, transfer them by inheritance, which is currently about the only legal course, and locate all those receipts which you kept since the 1970s.
It may be too early to contemplate the maxims of Sun Tzu, but it seems that only those of us of a certain advanced age recall the relative freedoms which we enjoyed in our youth. It may be that we will be called upon to attempt their reinstatement.