ECN Forum Forums General Topics of the Trade General Discussion Area Emergency Circuit breaker panels

Are any circuit breaker panels supposed to have a unique marking on them, to identify them from a normal power panel?
I'm talking in an industrial setting, where you have a lot of panels. The panel that is backed up with the generator, from a transfer switch.
Is it up to the electrician to identify them with a stripe on the panel? Any code rules (NEC,OSHA) about that?
Thanks - SJT