I doubt it. How would anyone know if abuse does goes down, if it was due to that law, or is violent crime trending down in spite of it? It looks as if the authors of this have assumed that there are no new assholes coming into new relationships no one has even heard of yet. I understand why a grieving parent would want to set something like this up, I really do, but he could be just trying to comfort himself into believing he’s doing something to help. Here in the US if you have a few bucks you can use the internet to do a criminal background check on pretty much anyone. Not sure if that option is available anywhere else.