The declination, cancellation or nonrenewal of a policy for private passenger nonfleet automobile insurance is prohibited if the declination, cancellation or nonrenewal is based: (1) On the race, religion, nationality or ethnicity of the applicant or named insured; (2) solely on the lawful occupation or profession of the applicant or named insured, except that this provision shall not apply to any insurer which limits its market to one lawful occupation or profession or to several related lawful occupations or professions; (3) on the principal location of the insured motor vehicle unless such decision is for a business purpose which is not a mere pretext for unfair discrimination; (4) solely on the age, sex, gender identity or expression, marital status or erased criminal history record information, as defined in § 46a-80a, of an applicant or an insured, except that this subdivision shall not apply to an insurer in an insurer group if one or more other insurers in the group would not decline an application for essentially similar coverage based upon such reasons; (5) on the fact that the applicant or named insured previously obtained insurance coverage through a residual market; (6) on the fact that another insurer previously declined to insure the applicant or terminated an existing policy in which the applicant was the named insured; (7) the first or second accident within the current experience period in relation to which the applicant or insured was not convicted of a moving traffic violation and was not at fault; or (8) solely on information contained in an insured’s or applicant’s credit history or credit rating or solely on an applicant’s lack of credit history. For the purposes of subdivision (8) of this section, an insurer shall not be deemed to have declined, cancelled or nonrenewed a policy if coverage is available through an affiliated insurer.