That's totally fair, and I have actually given it some thought, although I've not gotten as far as drafting text. I do agree with your last sentence. Maybe I'll get back to you when it's the weekend and not my lunch break.Than try to write it. I am not busting chops but write it how you think it is clear and then let us pick it apart.
I think you will find it is not easy to write, clear, concise, to the point, 'one rule fits all installations' code sections.
Probably one way to keep it concise is to refer to the switch leg rules in chapter 4.