I fail to see the significance of 230.70.
230.71 is the "6 disconnect rule" which would allow six breakers or other service disconnects. Only problem is 408.36 won't allow them in one panel.
I beleive its somewhat a mute point as they are no longer manufactured.
I wonder how this would apply to a load shedding transfer switch panel that Generac has? they have two busses, one for the main essential loads and one for the load shedding loads, although they are fed with a single main from the utility through two transfer switches so that might be the out?
I think you answered your own question.