California Code, Insurance Code - INS § 12095

No insurer admitted in this state to issue surety insurance shall fail or refuse to accept an application for a contractor's license or performance bond, or to issue such a bond to an applicant therefor, or refuse or cancel such a bond, under conditions less favorable to the obligor 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, or persons of every geographical area;  nor shall any characteristic listed or defined in subdivision (b) or (e) of Section 51 of the Civil Code, or location within a county, of itself, constitute a condition or risk for which a greater rate, premium, charge, guaranty, or collateral may be required of the applicant for such a bond.