37 CFR 11.51 - Depositions.
(a) Depositions for use at the hearing in lieu of personal appearance of a witness before the hearing officer may be taken by respondent or the OED Director upon a showing of good cause and with the approval of, and under such conditions as may be deemed appropriate by, the hearing officer. Depositions may be taken upon oral or written questions, upon not less than ten days' written notice to the other party, before any officer authorized to administer an oath or affirmation in the place where the deposition is to be taken. The parties may waive the requirement of ten days' notice and depositions may then be taken of a witness at a time and place mutually agreed to by the parties. When a deposition is taken upon written questions, copies of the written questions will be served upon the other party with the notice, and copies of any written cross-questions will be served by hand or Priority Mail Express® not less than five days before the date of the taking of the deposition unless the parties mutually agree otherwise. A party on whose behalf a deposition is taken shall file a copy of a transcript of the deposition signed by a court reporter with the hearing officer and shall serve one copy upon the opposing party. Expenses for a court reporter and preparing, serving, and filing depositions shall be borne by the party at whose instance the deposition is taken. Depositions may not be taken to obtain discovery, except as provided for in paragraph (b) of this section.
(b) When the OED Director and the respondent agree in writing, a deposition of any witness who will appear voluntarily may be taken under such terms and conditions as may be mutually agreeable to the OED Director and the respondent. The deposition shall not be filed with the hearing officer and may not be admitted in evidence before the hearing officer unless he or she orders the deposition admitted in evidence. The admissibility of the deposition shall lie within the discretion of the hearing officer who may reject the deposition on any reasonable basis including the fact that demeanor is involved and that the witness should have been called to appear personally before the hearing officer.