Terms and Rules at registration

[Alvin63]

Just testing out registration - after setting things up again while forum has been offline. So I had signed up a couple of spare accounts the other day. Today when I went to sign up a third, test account, a tick box to accept terms and rules was there. Which wasn't there before. I can't see anything about enabling that in user registration settings? So I'm guessing I've forced terms and rules? But don't remember doing that - where would I find that setting?
Terms and Rules at registration

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