To be honest, I haven't seen that page before with regard to NE elections. It was passed a decade ago and was in effect for a constitution that is no longer in place (the one in '04). The Northeast has had at least two since then.
To my knowledge, those regulations have not been applied to elections for the Assembly since it was first established.
In my opinion, those regulations are basically defunct. In conducting elections, I've referenced the most up-to-date version of the NE Constitution and any statute passed by the Assembly since it's establishment in 2009.
I skimmed through the Northeast statute and I haven't seen any more recent law that repealed or overwrote the clause I linked to. Although there's also
this 2011 law that specifically prohibits any ballot alteration whatsoever - it was passed only a couple of months before the most recent constitution, nothing in the current constitution counteracts it, and I don't see any law contradicting it that's been passed more recently