I'm not just making this shit up. That's what Title 24 of the California Code of Regulations says. Here is Justia's copy of the same title. https://regulations.justia.com/states/california/title-24/note-from-the-editors/ It's the law. Would you like to read it? We take Visa and Mastercard. Please present your ID at the door. We will require you to take an oath to follow our rules.