The State of California has placed certain requirements on mega-events (more than 1000 people indoors) as it relates to Covid 19 spread reduction and prevention. This conference is not a mega-event and does not have any requirements regarding vaccines or testing. The State of California does recommend that when attending a hotel conference that you are fully vaccinated and boosted and while masking in most public indoor spaces is no longer required, it is strongly recommended. This conference organizers recommend full compliance with these State guidelines.
Read more here: https://covid19.ca.gov/mega-events/