California Code, Government Code - GOV § 11124

(a) No person shall be required, as a condition to attendance at a meeting of a state body, to register their name, to provide other information, to complete a questionnaire, or otherwise to fulfill any condition precedent to their attendance.

(b) If an attendance list, register, questionnaire, or other similar document is posted at or near the entrance to the room where the meeting is to be held, or is circulated to persons present during the meeting, it shall state clearly that the signing, registering, or completion of the document is voluntary, and that all persons may attend the meeting regardless of whether a person signs, registers, or completes the document.

(c) This section does not apply to an internet website or other online platform that may require the submission of information to log into a teleconferenced meeting, provided, however, that a person required to submit such information shall be permitted to submit a pseudonym or other anonymous information when using the internet website or other online platform to attend the meeting.