Cal. Civ. Code § 1945.5

Notwithstanding any other provision of law, any term of a lease executed after the effective date of this section for the hiring of residential real property which provides for the automatic renewal or extension of the lease for all or part of the full term of the lease if the lessee remains in possession after the expiration of the lease or fails to give notice of his intent not to renew or extend before the expiration of the lease shall be voidable by the party who did not prepare the lease unless such renewal or extension provision appears in at least eight-point boldface type, if the contract is printed, in the body of
the lease agreement and a recital of the fact that such provision is contained in the body of the agreement appears in at least eight-point boldface type, if the contract is printed, immediately prior to the place where the lessee executes the agreement. In such case, the presumption in Section 1945 of this code shall apply.
Any waiver of the provisions of this section is void as against public policy.