There's more to the interesting San Francisco Code.
They've also decided that they don't need to abide by the State's Rules, either.
http://www.bsc.ca.gov/proc_rsltn/pr_proc_amnd.html "Make an express finding that each change is reasonably necessary because of local climatic, geological, or topographical conditions."
(These "express findings" aren't judged for their validity by the State, btw)
You're expected to follow rules made by an entity that doesn't seem to follow rules.
