"We granted certiorari to resolve a split among the Courts of Appeals and State Supreme Courts over a divorced spouse’s ability to waive pension plan benefits through a divorce decree not amounting to a QDRO, 552 U. S. ___ (2008). We subsequently realized that this case implicates the further split over whether a beneficiary’s federal common law waiver of plan benefits is effective where that waiver is inconsistent with plan documents, and after oral argument we invited supplemental briefing on that latter issue, upon which the disposition of this case ultimately turns. We now affirm, albeit on reasoning different from the Fifth Circuit’s rationale." Kennedy, Executrix v. Plan Administrator, et al., United States Supreme Court, January 30, 2009; No. 07-636