Looking at the info on the NSSF website this law is even worse than originally thought.
It would simply make selling or shipping small arms ammunition and components impossible.
For example if the store has explosives in it (this means powder, primers or ammunition) and a thunderstorm comes near the entire store would have to be evacuated.

This is a real threat and needs to be stopped.
See
http://www.nssf.org/news/PR_idx.cfm?PRloc=common/PR/&PR=BP070207.cfm
Then read the letter they suggest be sent to OSHA.
Gives some detail as to what is in store if we fail to raise enough heck.

Dan