Oregon Revised Statutes Labor and Employment; Unlawful Discrimination § 659A.256

(1) Their purpose is to promote the safety or welfare of the employees and authorized persons allowed access;

(2) They preserve the employer's property from abusive use;

(3) They are reasonably related to the purpose for which they are adopted;

(4) They apply to all employees on the premises in a fair manner; and

(5) They are sufficiently explicit in the prohibition, direction or limitation of the employee's conduct to fairly inform the employees of what must be done to comply.