Compare With Shattered Mirror

I read the book "Shattered Mirror" and what i think the most important word in the book is "Vida Law". The Vida Law is for the whitches (vampire hunters). I think it was made by Dominique Vida one of the main and powerful witch. The Vida Law shows up plenty of times in the book. And that is why i think that word is important because it is acually a rule for all the whitches and they have to fallow the rules or they can be disown. As to not have any powers.