The testimony of a subscribing witness is not necessary to authenticate a writing unless required by the laws of the jurisdiction whose laws govern the validity of the writing.
ORS 40.515
Known as the Oregon Evidence Code
The act spans §§ 40–40 (98 sections).
1981 c.892 §70
Official source: Oregon State Legislature. Reproduced from public-domain Oregon statutes; confirm against the official source for the current text. Not legal advice.