Oregon Revised Statutes Elections § 251.355

(1) Not later than the date specified by the Secretary of State by rule, in a county that prepares a county voters' pamphlet, any person may file with the county clerk a typewritten argument supporting or opposing any measure to be submitted to the voters on the ballot. The county clerk may not accept any arguments that are not accompanied by the fee established by the Secretary of State or a petition in a form prescribed by the Secretary of State. A petition shall contain the signatures of at least four percent of the electors in the county eligible to vote on the measure to which the argument refers, or the signatures of 1,000 electors in the county eligible to vote on the measure to which the argument refers, whichever is less. The number of registered electors in an electoral district, for the purposes of this section, shall be calculated on January 1 of each year. Each person signing the petition shall subscribe to a statement that the person has read and agrees with the argument. The signatures on each petition shall be certified by the county clerk in the manner provided in ORS 249.008. The petition shall be filed with the county clerk.

(2) The county clerk shall include in the county voters' pamphlet, on the page of the printed argument, the name of the person who submitted the argument, the name of the organization the person represents, if any, whether the argument supports or opposes the measure and a disclaimer that the argument does not constitute an endorsement by the county and that the county does not warrant the accuracy or truth of any statement made in the argument.