That's just one of several new regulations that have gone into effect since a 15-year-old girl died at the Electric Daisy Carnival from a possible drug overdose at the Coliseum just months ago. Over 100 other young people were hospitalized for drug-related illness and injuries after being trampled when people tried to leave the crowded gathering of 185,000.
Security was out in full force at Saturday's Love Festival - checking IDs, watching for signs of drug use and stopping attendees from bringing in things like backpacks. According to police, several people were detained for attempting to use fake IDs and 31 people were arrested for drug and alcohol-related offenses but no other major disturbances were reported.
The L.A. Coliseum had imposed a temporary ban on such large-scale rave events but did allow for three events that had already been scheduled to go forward, including Saturday's Love Festival.
Doctors were also on site to tend to any medical problems.
The Love Festival was started in Los Angeles in 1992 and has since expanded to cities around the globe. Previous years saw higher attendance but the Los Angeles police could not provide enough security to accommodate bigger numbers.