UpdatedMon, Apr 19, 2021 at 5:40 pm PT Reply(1) Many of California's indoor venues have remained dark for more than a year. Now that indoor gatherings were cleared to resume, these establishments will have a big incentive to ask for proof of vaccination or a recent COVID-19 test — more capacity. (AP Photo/Eric Risberg) CALIFORNIA — Indoor events are returning to the Golden State as it heads toward reopening completely by the summertime. And while officials have said they are not planning to enforce a vaccine passport, venues hosting live performances have a huge incentive to require proof of vaccination — larger capacity. Earlier this month, the state released a fresh new set of rules for businesses and venues — both large and small — to resume indoor events. Included in the guidance on capacity was a note that capacity could increase at each tier level "if all guests are tested or show proof of full vaccination."