Oregon Revised Statutes Public Health and Safety § 443.495

(1) Any facility operated by an institution of higher education.

(2) Any private room and board facility approved by an institution of higher education which has as a resident a student or an employee of the institution.

(3) Any private or nonprofit retirement facility which does not fall under the generally understood definition of a “room and board facility,” a “boarding house” or a “boarding hotel” and where a majority of the residents are retirees.

(4) Any privately arranged housing the occupants of which may not be related by blood or marriage.