Please click on the link below to read the AMA Action Alert concerning California SB 142. The AMA states that it “may pose a significant threat to recreational model aviation.” There’s a form on the AMA page that you can submit to California Governor Jerry Brown to express your opinion.
http://amagov.modelaircraft.org/18534/californiasb142/
Here’s an AMA video giving an overview of the legislation and the action you can take.