Or. Rev. Stat. § 419C.343
(1) After the commencement of any proceeding in which a motion to waive has been filed, a party may move the court for an order allowing the taking of a deposition 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:
[1993 c.546 §81]