Anyone aged 12 and over attending a large-scale outdoor event in Los Angeles County with 10,000 people or more—such as college and pro football games—will be required to show proof of full vaccination against COVID-19 or a negative test taken within 72 hours.

The mandate will apply to any ticketed, outdoor gathering of 10,000 people or more, including sporting events, concerts and even theme parks such as Six Flags Magic Mountain and Universal Studios. All attendees, regardless of vaccination status, must wear a face covering at events.

Since the mandate only applies when 10,000 or more people are in attendance, the requirement will only be enforced on select days at theme parks when capacity reaches that threshold. Six Flags Magic Mountain officials said the requirement will be applied “on certain designated days.’’

According to Universal Studios Hollywood, the vaccine/testing verification will occur “when required based on theme park attendance.’’

Valid forms of proving vaccination status include a white CDC or WHO vaccine card, a photo of the vaccine card or a digital vaccination verification issued by the state or other health agency.

Theme park operators in the county, along with an industry association, had expressed concerns about the requirement, contending parks had limited staffing to check the required documentation—both a vaccine/testing verification and a photo ID—potentially leading to long lines for admission to the parks. They also argued that patrons who purchased tickets in advance before the requirements were announced should be given a grace period.

As well, all patrons and employees at indoor portions of bars, wineries, breweries, nightclubs and lounges in the county will have to show proof of at least one dose of vaccine. All patrons and employees will need to have a second dose by Nov. 4.