The basic requirement is that every operating system in the state will need to collect age information from users during the account setup process. That data then gets sorted into one of four age brackets – under 13, 13 to under 16, 16 to under 18, and 18 or older. This is then made available to app developers through a real-time API. Developers are required to request that signal when their app gets downloaded or launched. Once a developer receives that, they're legally considered to have "actual knowledge" of the user's age range. That shifts the responsibility for serving age-appropriate content directly onto them. Source: https://www.yahoo.com/news/articles/ca-law-requires-age-verification-124500151.html?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAANga0r0UkkgeymqGs5BHrvv9i7wYc9NYzpo-X-SukGX00pivFpAUfS9HbnRn7J3qX_1KFs8r7RDIH9yyRVz9ZT2pyNQf2MhsbYHUTWBT7pGNNhB-vfiGwN-JJFQ-IxPNeWodMNgt7kdVNJUGyhEJC6VN86-tniTjNOjjhoUKxSph