It is a California regulation, yes. I suspect that OP is making reference to the fact that as California goes, often so goes the national policy. Or, at least that's how it's played out with regularity in the past.

CA is 14.6 of US GDP and 12% of the population. It's hard to have a large business in the US that doesn't have $25m revenue or handle the information of 100k CA residents, so there is very broad applicability.