Regardless of whether it is substantially correct now, due to the fact it is subject to constant editing, it may or may not be substantially correct in five seconds, five minutes, hours, or days.
It does have a nice general description and analysis of the concept.
I would do nothing more than consider it a very weak starting point, for research to be validated by any specific states' statutes. It is weak due to it's design and open framework.
And, Texas should be present on it if they want to be inclusive.