5 C.F.R. § 831.1108 Witnesses.
Title 5 - Administrative Personnel
(a) Witnesses shall testify under oath or affirmation and shall be subject to cross-examination. (b) Each party is responsible for securing the attendance of his witnesses. OPM has no power of subpena in these cases.
Title 5: Administrative Personnel
PART 831—RETIREMENT
Subpart K—Prohibition on Payments of Annuities
§ 831.1108 Witnesses.