Section 904.252 - Witnesses(a)Fees. Witnesses, other than employees of a Federal agency, summoned in an administrative proceeding, including discovery, are eligible to receive the same fees and mileage as witnesses in the courts of the United States.(b)Witness counsel. Any witness not a party may have personal counsel to advise him or her as to his or her rights, but such counsel may not otherwise participate in the hearing.(c)Witness exclusion. Witnesses who are not parties may be excluded from the hearing room prior to the taking of their testimony. An authorized officer is considered a party for the purposes of this subsection.(d)Oath or affirmation. Witnesses shall testify under oath or affirmation requiring the witness to declare that the witness will testify truthfully.(e)Failure or refusal to testify. If a witness fails or refuses to testify, the failure or refusal to answer any question found by the Judge to be proper may be grounds for striking all or part of the testimony given by the witness, or any other action deemed appropriate by the Judge.(f)Testimony in a foreign language. If a witness is expected to testify in a language other than the English language, the party sponsoring the witness must indicate that in its Initial Disclosures so that an interpreter can be arranged for the hearing. When available, the interpreter should be court certified under 28 U.S.C. 1827 . 71 FR 12448 , Mar. 10, 2006, as amended at 87 FR 38939 , June 30, 2022