(a)(1)No admitted insurer that is licensed to issue and issuing motor vehicle liability policies, as defined in Section 16450 of the Vehicle Code, shall fail or refuse to accept an application for that insurance, to issue that insurance to an applicant therefor, or issue 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, including, but not limited to, language, or persons of the same geographic area; nor shall any characteristic listed or defined in subdivision (b) or (e) of Section 51 of the Civil Code, including, but not limited to, language, or location within a geographic area, of itself, constitute a condition or risk for which a higher rate, premium, or charge may be required of the insured for that insurance.
(2)As used in this section "geographic area" means a portion of this state of not less than 20 square miles defined by description in the rating manual of an insurer or in the rating manual of a rating bureau of which the insurer is a member or subscriber. In order that geographic areas used for rating purposes may reflect homogeneity of loss experience, a record of loss experience for the geographic area shall include the breakdown of actual loss experience statistics by ZIP Code area (as designated by the United States Postal Service) within each geographic area for family owned private passenger motor vehicles and lightweight commercial motor vehicles, under 11