Unexpected visitors on the porn set

Village Voice reports:

Just like "regular" moviemaking, in Los Angeles as elsewhere, filming porn requires you to apply for and receive a permit from the city (or county). If you're in a residential neighborhood, the neighbors are notified in advance, and sometimes you also have to reach out to the community or homeowners' association in advance. There are rules about when you can film, where you can park, etc.—and for porn, you always have a clause that says nudity and sex cannot be visible or audible to people outside the house. In addition, officials from the permit office can drop in, the fire marshal can do a spot-check, and apparently, the vice squad can stop by, too. Houses become known as "hot" when they are busted too often for shooting without a permit, or the neighbors repeatedly complain, or there are too many companies applying for permits at one location.

A license by the state.