What the hell does this even mean? This makes no sense.
i) A successful vote of two thirds of voting (either in the affirmative or in the negative) members Legislative Assembly of the Northeast Region.
ii) A successful vote of majority of all members of the Legislative Assembly, voting, abstaining and absent members combined.
You wrote that there has to be a successful vote of 2/3 of the members, but then it has be a successful vote of the majority of members? What the hell?
I get the impression that "majority of all members" simply means that more than half of the Northeast has to vote, not that more than half of the Northeast has to vote in favor.
In any case, it does have to be an amendment as it involves constitutional offices.