As evidenced by what? Your own summary makes it seem as if the only changed factor was the government regulations, so why wouldn't that be the "what changed"?

But to be more charitable: if you would like to know what - exactly - changed, I would suggest googling it? I'm honestly not trying to be snarky; what possible information could I have that you couldn't get easier by googling it? The thing you are asking about is a point of fact. The law is written text, and the changes are clearly defined. In my experience, whenever I don't understand the finer effects of a new law, I've found that there are a ton of nuances and complications and party interests that make the outcome more understandable to me. But I have never, in my life, had those nuances and complications made more clear or obviously true by way of a response from some forum commenter. It has ALWAYS been by seeking out the information, myself, from direct sources. So that's my suggestion to you, if you're earnestly asking.

But, either way, this is about all I have to say on the subject. Carry on as you will, and have a good one!