Well yes when the Gen 3 plants take off it'll still be an issue. Selection criteria and training accredidation are still the same regardless of the type of reactor used.
Virtually everything about training or personnel selection is a guideline, but you'd best have a very solid waiver before deviating from them. INPO and the NRC don't want to get into the business of telling you who to hire and what exact skill set the employee must meet, otherwise if that employee screws up the regulators and overseers are potentially liable. The only place that ever tells you exactly what you have to train on is 10CFR50 (Or is it 55). But it doesn't tell you how you have to do it, except in some limited instances.
It's the same as when they review your application for a plant modification that potentially effects safety. They might approve it but if it goes wrong, or later is proven to increase vulnerability to an accident they'll say "Hey it's YOUR plant, YOU'RE responsible for complying with the regulation." And that's the way it should be.
Mike