[ RadSafe ] Possession of yellowcake

[Boomologist at GotHotRocks.com]

It's sometimes difficult to determine which part of the rules apply to what.
http://www.nrc.gov/reading-rm/doc-collections/cfr/part040/part040-0013.html

§ 40.13 Unimportant quantities of source material.
(b) Any person is exempt from the regulations in this part and from the 
requirements for a license set forth in section 62 of the act to the extent 
that such person receives, possesses, uses, or transfers unrefined and 
unprocessed ore containing source material; provided, that, except as 
authorized in a specific license, such person shall not refine or process 
such ore.