Although the event's promoter was praised by commissioners, police officials and fire officials for making every effort to put on a peaceful, problem-free event, some questioned whether any undertaking that size could be pulled off successfully.

"Everybody says the same thing: The planning was exemplary, the organization was exemplary, but the outcome wasn't exemplary," said Commissioner David Israel.

The commission also voted to continue indefinitely a moratorium on booking any future raves at either the Coliseum or the adjacent, much smaller, Los Angeles Memorial Sports Arena.

Commissioner Zev Yaroslavsky said contractual obligations likely make it impossible to cancel the three raves already scheduled for the Sports Arena. But he added it would give their promoters a chance to demonstrate they can pull them off safely under the new rules and could set a standard for such events around the country.

The next rave is scheduled next month, with another on Halloween and another on New Year's Eve.

The Sports Arena was also the site of a New Year's Eve rave last year. It drew 45,000 people and one person there died, although that death got far less attention than that of 15-year-old Sasha Rodriguez, who collapsed during the Electric Daisy Festival and died at a hospital where she was treated for drug intoxication.

More than a dozen people, including concerned parents, rave attendees and rave promoters spoke briefly during Friday's meeting. Among them was Debbie Macaluso, who said her 19-year-old daughter, Aisha Armer, nearly died of an Ecstasy overdose at the 2009 Electronic Daisy Carnival, which also took place at the Coliseum.

"The promoters say they're going to be safe and I feel it's all about money," she said.

Pasquale Rotella, whose Insomniac Events puts on the annual festival, said his organization has already put into effect the 18-and-older requirement, which would have kept Rodriguez out, and he pledged to work with officials in doing everything possible to make future events safe. His company is one of the promoters scheduled to stage the New Year's Eve event.

The recommendations to raise the age of rave attendees to 18 and to have doctors on the premises—to treat drug overdoses and other emergencies—were contained in a 14-page report prepared by a law firm retained by the Coliseum Commission after last month's tragedy.

The Electronic Daisy Carnival, which began 14 years ago, has been held at the Coliseum the past four years, during which it has grown from a one-day event that attracted 29,000 people to this year's gigantic festival that featured five stages, light shows, carnival rides and performances by such top-name acts as Will.I.Am of the Black-Eyed Peas and Moby.

According to police, it also featured numerous problems, including gatecrashers who trampled people waiting to get in, people climbing fences to get near the stages, people trying to steal tickets from those who bought them and numerous people getting drunk or high on drugs.

Attorney Skip Miller of the firm Miller Barondess, who presented the report, said numerous injuries and occasional deaths aren't uncommon at large public events, running down a list that included baseball games, rock concerts and automobile races.

But he added that raves present a particular problem because the drug Ecstasy is widely used at them by people who believe it is safe and enhances the enjoyment of the music and the light shows.

"There are deaths associated with them from drug overdoses," Miller said. "It is a serious societal problem."