Joe,
Safety training does not have to be formal and certified to be effective. Your clause would effective render homeowner DIY illegal, and serves only to prop up the safety training industry- classwork is NOT the only way to learn. Sorry, but I can't see NFPA approving it unless you remove all mention of formal training, certification, authorization, etc.
You also fail to mention that a lot (most?) of the electrocutions come not from electrical workers, but accidental contact from other trades. There is nothing we can do to prevent stupidity.
I do agree that there has to be a better definition of "qualified person", but I do not believe this is the best approach.
