Oregon Revised Statutes Procedure in Criminal Matters Generally § 144.635

(a) “History of sexual assault” means that a person has engaged in unlawful sexual conduct that:

(b) “Sexually violent dangerous offender” means a person who has psychopathic personality features, sexually deviant arousal patterns or interests and a history of sexual assault, and who the State Board of Parole and Post-Prison Supervision or local supervisory authority finds presents a substantial probability of committing an offense listed in subsection (3) of this section.

(a) The person was 18 years of age or older at the time the person committed the offense; and

(b) The board or local supervisory authority finds that the person is a sexually violent dangerous offender.

(a) Rape in the first degree and sodomy in the first degree if the victim was:

(b) Unlawful sexual penetration in the first degree; and

(c) An attempt to commit a crime listed in paragraph (a) or (b) of this subsection.