House rules for au pair

We are in the application process with culture care au pair, I’m a little stuck on the House rule section. Was curious about what you all are using for house rules with regard to guests, curfew, etc.

I don’t like the idea of guests popping up, however I don’t know what the norms are in this situation. Please feel free to share.

Also, if you have any experience with culture care, we would love to hear it.