Indeed but I have seen it with clubs and teams w/which I have been involved. And I'm "that guy" who points it out, talks to the coach, talks to the DOC, talks to the board, etc. As I noted upthread, many treating physicians are unaware of the legal requirements, even many who routinely treat athletes.
Parents should have this law at the ready - it is only our kids' brains - or at least be able to google, "California Concussion Law". You will hit this statute in the first couple of results.
Many? Name three.