Or. Rev. Stat. § 419B.884
(1) After the commencement of a proceeding under ORS 419B.100 or 419B.500, a party may move the court for an order allowing a deposition to be taken to perpetuate the testimony of a witness who is:
(2) The affidavit in support of the motion to take a deposition to perpetuate testimony, in addition to setting forth the reasons described in subsection (1)(a) and (b) of this section, shall also set forth:
[Formerly 419B.315]