Well since I would have to characterize this as a non-source I figure its ok to post the url:
http://www.glory-of-the-garden.com/essentia.htm (http://www.glory-of-the-garden.com/essentia.htm)
.
They also will not sell bitter almond oil.
I suspect that all of this means that if you want to buy
sassafrass wholesale then you have to get an FDA license.
Or course once you have the license then you have to keep
records of any sales you may make. Say you buy 55 gal of sassafrass oil and sell it in 6 ounce bottles. Well, then you would be required to keep a record of every 6 ounce bottle of sassafrass oil you sell retail.
It's just a way to keep track of where all that sassy oil goes.