Old stock. It's a mineral. It doesn't go bad. And you are probably correct that it would take a ream of paperwork and 2 congresscritters to buy it today.
Besides, not much is required for meat preservation.
That's the point to stockpiling stuff, so you can have it when you need it, regardless of why it's not available.
/johnny
135 posted on 04/05/2012 12:05:46 PM PDT by JRandomFreeper
(Gone Galt)