5 C.F.R. § 838.124 Employees' and retirees' responsibilities.
Title 5 - Administrative Personnel
Employees and retirees are responsible for— (a) Raising any objections to the validity of a court order in the appropriate State court; and (b) Submitting all disputes with former spouses to the appropriate State court for resolution.
Title 5: Administrative Personnel
PART 838—COURT ORDERS AFFECTING RETIREMENT BENEFITS
Subpart A—Court Orders Generally
Division of Responsibilities
§ 838.124 Employees' and retirees' responsibilities.