How does it work with the personalized chat message on twitch?

Twitch has the function, if you want to write in the chat for the first time, that the rules are then displayed and you have to accept them. So how does it work, is this a function of twitch itself or of a bot? And if it's from a bot, which one is it?

Simply set the rules on the dashboard, that's not a bot or anything

Ok, they are then displayed when you set that

Yes

OK thanks