Oregon Revised Statutes Labor and Employment; Unlawful Discrimination § 656.508

(1) The State Accident Insurance Fund Corporation shall classify occupations or industries with respect to their degree of hazard and fix premium rates upon each of the occupations or industries sufficient to provide adequate funds to carry out the purposes of this chapter and the duties of the State Accident Insurance Fund Corporation.

(2) The State Accident Insurance Fund Corporation may annually, and at such other times as it deems necessary, readjust, increase or decrease the premium rates of employers insured with the State Accident Insurance Fund Corporation. Any such readjustment, increase or decrease shall be made and become effective on such dates as the State Accident Insurance Fund Corporation may determine. The State Accident Insurance Fund Corporation shall notify the employer of the rate.

(3) The State Accident Insurance Fund Corporation may establish a uniform system of rate modification conforming to recognized insurance principles including schedule rating and experience rating, premium discount and retrospective rating.