Oregon Revised Statutes Crimes and Punishments § 164.205

(1) “Building,” in addition to its ordinary meaning, includes any booth, vehicle, boat, aircraft or other structure adapted for overnight accommodation of persons or for carrying on business therein. Where a building consists of separate units, including, but not limited to, separate apartments, offices or rented rooms, each unit is, in addition to being a part of such building, a separate building.

(2) “Dwelling” means a building which regularly or intermittently is occupied by a person lodging therein at night, whether or not a person is actually present.

(3) “Enter or remain unlawfully” means:

(4) “Open to the public” means premises which by their physical nature, function, custom, usage, notice or lack thereof or other circumstances at the time would cause a reasonable person to believe that no permission to enter or remain is required.

(5) “Person in charge” means a person, a representative or employee of the person who has lawful control of premises by ownership, tenancy, official position or other legal relationship. “Person in charge” includes, but is not limited to the person, or holder of a position, designated as the person or position-holder in charge by the Governor, board, commission or governing body of any political subdivision of this state.

(6) “Premises” includes any building and any real property, whether privately or publicly owned.