I was at the SLO County Planning department today and was reading their quarterly newsletter. There was an article about billboards. While billboards (off-site advertising) is not permitted in the County, the billboards along Highway 101 are grandfathered in. This means they can legally remain there as long as they are not substantially changed because they were already there when the law was created.
I bet we’ll see these billboards stay as it’s very profitable for the companies that own them.