I have a friend that got a speeding ticket on the back side of the Marin Headlands - it was a moving violation, he went to driving school to keep it off his rec

I have a friend that got a speeding ticket on the back side of the Marin Headlands - it was a moving violation, he went to driving school to keep it off his record. Where in the Bay Area are bells required? I've never heard of police there ever enforcing equipment requirements, not even lights at night.