Sorry.........don't buy it. I heard of localized attempts at similar "laws" or statutes (i.e. the Bay Area), etc. but I'll have to ask you to show me a link to the legislation that, effectively, makes homeschooling illegal in California. I highly, highly doubt this could happen without serious rioting happening, even in California (lived......and homeschooled.........there for many years).
I really don't understand why people put up with California. I don't think I could live there for 5 minutes.