Switchgear Mat Requirements

I'm looking for a clear national standard on when insulated switchgear or switchboard matting is required in electrical equipment rooms in commercial buildings. There are some state requirements I have seen, but nothing that applies generally in all buildings.

I know there is an OSHA standard for the material (1910.137), but it doesn't address when you are required to provide this insulated floormat.

Is there some rule or standard that applies here, or am I just spinning my wheels.