I agree ,totally.
Thank you Mark, for all your communication and input on this thread.
I think anyone using a piece of ivory or mammal product ( beyond the Bovine species ) should keep good records of the source and use of that product. I have a folding file with the papers on most all the ivory I have ever bought. I have never had to produce papers at a show, but could if asked.....it is right in the box under the table.
I'll add some info for general thought. This is from personal experience, and not legal advise, but most of the legal folks I know will fully agree to these general rules:
Attitude is your best friend or worst enemy. If a F&W person asks you a question on a knife ( or a policeman asks you for ID, etc.) you can look them in the eye with a steel glare and say,:
"I'm an American citizen, and I am not doing anything wrong....... I don't have to show you squat."
or
" Good morning, officer, Here is my paperwork/ID/etc.....Is there a problem? "
The first answer will make the LEO immediately dislike you and may lead him/her to go beyond the necessary routine check they started. The second will make you the nice guy, and give them no reason to look farther in many cases. I know a lot of people in these occupations, and they as a rule gauge the persons attitude and reactions far more than the situation.
The same goes for provenance. Try these two scenarios:
You tell an agent that the narwhal handle is over 70 years old, but you don't have any papers.
or
You tell him, "Just a minute.", and take out the copy of an Ebay receipt for a narwhal tusk you purchased from an online seller. The description states that his Dad brought it back from Alaska in 1932. You also have a photo of the stack of handle you cut from the tusk. Your knife certificate for that particular knife also says, " Made form a 1932 Narwhal tusk."
Now, the Ebay receipt and those other items aren't in any way a good provenance, and could be based on false info from the seller....but it would be up to the agent to determine that. With you being up front and providing the source, which you took to be legal, and documenting the product, you are not suspect.
General good advise for anyone, especially if you are selling things:
Keep the receipt from any regulated product....regardless of how weak the provenance is. A signed piece of paper from a neighbor, stating that the elephant tusk you bought at his yard sale was pre-ban is not much, but it is a lot better than nothing. It takes little proof to avoid a problem in many cases. ( Not that things will normally ever go to a trial - but it is amazing how weak a piece of evidence it takes in a trial to prove the defense case.)
It is all in the way you handle yourself and your attitude. Sadly, many of the serious and often fatal situations on the news are caused by the reactions people have to being asked questions by governmental agents.
Final comment:
Yes, as in any walk of life there are good and bad people out there. Some Federal and State agents, LEO's, and other governmental persons can be a$$h@!es....but you adding one more a$$h@!e to the situation will not help things at all. Be the bigger person if needed.