Rule 606. Competency of juror as witness. A member of the jury may not testify as a witness before that jury in the trial of the case in which the member has been sworn to sit as a juror. If the juror is called so to testify, the opposing party shall be afforded an opportunity to object out of the presence of the jury. [1981 c.892 §49]

ORS 40.335 — under Chapter 40.