California Code, Insurance Code - INS § 679.71

No admitted insurer that is licensed to issue any policy of insurance covered by this chapter shall fail or refuse to accept an application for, or to issue a policy to an applicant for, that insurance (unless the insurance is to be issued to the applicant by another insurer under the same management and control), or cancel that insurance, under conditions less favorable to the insured than in other comparable cases, except for reasons applicable alike to persons of every characteristic listed or defined in subdivision (b) or (e) of Section 51 of the Civil Code; nor shall any of those characteristics, of itself, constitute a condition or risk for which a higher rate, premium, or charge may be required of the insured for that insurance.