The board unanimously amended its anti-loitering ordinance Tuesday, prohibiting registered sex offenders from answering the door to trick-or-treaters.
It's also illegal for them to have holiday decorations on their house or to turn on exterior lights on Halloween. They're required to leave all lights off from 5 p.m. until 11:59 p.m.
Violators are subject to fines of $1,000 or more and up to six months in jail.
The change replicates laws already in place in Perris, San Jacinto and Orange.