(a) An employee, separated employee, or retiree who alleges that a court order is invalid must prove the invalidity of the court order by submitting a court order that—

(1) Declares the court order submitted by the former spouse is invalid; or

(2) Sets aside the court order submitted by the former spouse.

(b) OPM must honor a court order acceptable for processing that appears to be valid and that the former spouse has certified is currently in force and has not been amended, superseded, or set aside, until OPM receives a court order described in paragraph (a) of this section or a court order amending or superseding the court order submitted by the former spouse.