Oregon Constitution Art. I § 45

(1) In all grand juries and in all prosecutions for crimes tried to a jury, the jury shall be composed of persons who have not been convicted:

(2) This section applies to all criminal proceedings pending or commenced on or after the effective date of this section, except a criminal proceeding in which a jury has been impaneled and sworn on the effective date of this section. Nothing in this section reduces a criminal defendant's rights under the Constitution of the United States. Except as otherwise specifically provided, this section supersedes any conflicting section of this Constitution. Nothing in this section is intended to create any cause of action for compensation or damages nor may this section be used to disqualify a jury, invalidate an accusatory instrument, ruling of a court, conviction or adjudication or otherwise suspend or terminate any criminal proceeding at any point after a jury is impaneled and sworn or on appeal.