Well, this seems like it would be quite the stretch:
Proponents of President Barack Obamas executive orders in the area of gun control point to OSHAs General Duty Clause as a possible basis for a national no guns at work policy.
The General Duty Clause requires employers to maintain a safe workplace, including the implementation of policies that may be necessary to further that goal. Proponents argue that this significant increase in workplace violence coupled with the expansion of concealed carry laws would be the basis for this regulatory change. Moreover, because a General Duty Clause already exists within the OSHA statute, there would not be a need for congressional approval.
So, more BS. And it can be done without an act of the legislature, in theory. That is exactly what is wrong with government.