TexasCHLforum.com

TSRA or NRA supporters may have put such a clause in for the event of a rash of school shootings or terrorist threats, which could come in the form of the 9/11 types or the stalker-boyfriend of a student types.

I can see situations that may cause upper administration to give teachers or principals special permission, but I don't see them doing this simply because we ask.
It's sad, considering that so many violent attacks happen without prior warning.