Oregon Revised Statutes Insurance § 746.018

(1) In cities of 300,000 or more, and except as provided in subsection (3) of this section, no insurer shall make or permit any unfair discrimination between risks of essentially the same degree of hazard in the issuance of burglary and theft or robbery insurance policies or casualty insurance policies which insure against liability to persons arising out of the use or control of real or personal property other than motor vehicles.

(2) Property insured or persons insured against liability arising out of use or control of real or personal property other than motor vehicles, if comparable in other respects in exposures to the peril insured against, shall not be deemed to be of different hazard solely because of the geographic location of the property or the place of residence or business of the person to be insured.

(3) Notwithstanding subsection (1) of this section an insurer may make or permit discrimination between risks of essentially the same degree of hazard in the issuance of insurance policies described in subsection (1) of this section if the insurer, at the time of the discrimination, insures a percentage of the similar risks at least equal to the ratio that its premiums for the respective line of business as reported in the annual statement required by ORS 731.574 for the second preceding calendar year bears to the total premium for the same line of business as reported by all insurers in the annual statements required by ORS 731.574 for the second preceding calendar year, within a square one mile on each side centered upon the location of the property, insurance in regard to which the insurer declines to issue.