Cal. INS § 10113

Every policy of life, disability, or life and disability insurance issued or delivered within this State on or after the first day of January, 1936, by any insurer doing such business within this State shall contain and be deemed to constitute the entire contract between the parties and nothing shall be incorporated therein by reference to any constitution, by-laws, rules, application or other writings, of either of the parties thereto or of any other person, unless the same are indorsed upon or attached to the policy; and all statements purporting to be made by the insured shall, in the absence of fraud, be representations and not warranties. Any waiver of the provisions of this section shall be void.