did they reserve the rights to surprise inspections and such of what you keep on your person in the company policy? they shoulda given you a copy or explained it to you when you signed on. even if they didn't you legally can't plea ignorance of the rules as a reason for not following them. it could be a ploy to get to see those knives and they'll find some other reason to let you go. in the end, unless you're union, you're at their mercy. now we're on course for unions against unions.