Actors in many of the adult films made in America's porn capital must use condoms under a law that has taken effect, but the prophylactic police are not yet on the beat.

How they will enforce such a regulation once they do begin enforcement is anyone's guess.

In Los Angeles, where an estimated 90% of the country's porn films are made, city officials and industry leaders are trying to settle on a way to ensure that there is more safe sex on the set.

Some say health care professionals should be present during a shoot to make sure actors use condoms.

"Today really is a milestone in the advance of health and safety for these adult filmmakers," said Ged Kenslea, spokesman for the Aids Healthcare Foundation, which lobbied for years for the measure.

When the City Council passed the law in January, it gave police, the city attorney, the porn industry and others six months to recommend the best way to enforce the measure. They have roughly four months left.

Until then, it is unclear whether police or health officials will start showing up at shoots.

To shoot a film, the law requires a permit as well as the condom use. It contains a loophole for some of the larger porn companies, exempting the condom requirement from films made on studio soundstages.

The question is whether smaller companies, in which only a handful of people show up at a house, usually in the city's San Fernando Valley, quickly make a movie in a day or two and then move on, will pay any attention.

The head of one of the industry's largest filmmakers said he had not been approached about working out how the ordinance would work and how the city would deal with violators.

"We have not been approached," said Steven Hirsch, chief executive and co-founder of the Vivid Entertainment Group. "We assumed we would be approached but we have not been."