From the Pomona website.
Hours & Dates
As of Oct. 7, 2021, the Los Angeles Department of Public Health will require all employees and attendees of large outdoor events (10,000 people or more) to show proof of vaccination or provide a negative Covid test taken within 72 hours of the event. Also, all attendees must wear face coverings regardless of vaccination status. The Pomona Swap Meet will be included. Please be sure that you and anyone over the age of 12 entering the swap meet are prepared to show proof of vaccination or a negative test. No one will be allowed to enter without one of the two and no refunds will be given. Please call us at 714-538-7091 with any questions prior. Thank you for your patience and understanding!
Does the Fling fall into this requirement?