Oregon Revised Statutes Insurance § 742.248

(1) Each person accepting a policy in a mutual fire insurer thereby becomes a member of the insurer and liable for a proportionate share of losses and operating expenses.

(2) Any person or persons holding property in trust may insure the same in a mutual fire insurer, and as such trustee assume the liabilities and be entitled to the rights of a member, but shall not be personally liable upon such insurance policy.

(3) A mutual fire insurer may fix the contingent and mutual liability of its members for payment of losses and expenses by a uniform rule set forth in its bylaws and policies. Such mutual liability shall not be less than twice the amount of the usual advance assessment written in the policy.

(4) A mutual fire insurer that received a certificate of authority prior to September 2, 1963, and has accumulated in the regular course of business assets of not less than $200,000, of which not less than $100,000 is surplus determined as provided in the Insurance Code, may while in that condition and subject to the approval of the Director of the Department of Consumer and Business Services adopt bylaws limiting the liability of its policyholders to the premium specified in its policies. The power to issue policies with such limitation of liability continues only during the time the insurer is in such financial condition.

(5) A mutual fire insurer that received a certificate of authority after September 2, 1963, and has $500,000 in surplus determined as provided in the Insurance Code, may while in that condition and subject to the approval of the director adopt bylaws limiting the liability of its policyholders to the premium specified in its policies. The power to issue policies with such limitation of liability continues only during the time the insurer is in such financial condition.

(6) Every mutual fire insurer which has not limited the liability of its policyholders in accordance with subsections (4) and (5) of this section must print upon its policies such bylaws as will define the liability of a policyholder in addition to the statement required by ORS 742.036.