Oregon Revised Statutes Trade Regulations and Practices § 646.836

(1) While in the possession of the Attorney General any documentary material, answers to interrogatories and transcripts of oral testimony shall be held in confidence and not disclosed to any person except:

(2) Any such material or answers may be used in any investigation conducted pursuant to ORS 646.705 to 646.826 or in any case or proceeding before a court or administrative agency, or may be disclosed to any committee or subcommittee of the Legislative Assembly in such manner and for such purposes as the Attorney General deems appropriate.

(3) Upon completion of a case brought under this section, the Attorney General shall return any such documents, answers and transcripts which have not passed into the control of the court through the introduction thereof into the records, to the person who provided such documents, answers or testimony upon the person's request in writing. If no case in which such material may be used has been commenced within a reasonable time after completion of the examination or analysis of all documentary material, but in no event later than four years after production thereof, the Attorney General shall, upon written request of the person who produced such material, return all documents, answers and transcripts to the person who provided them.