CFR›Title 5›Chapter I›Part 831›Subpart F›Subject Group Eligibility ContainsSections 831.641–831.645CorpusDaily eCFRDisplayed edition2026-05-12Last updated2026-05-12 Sections 831.641 § 831.641 Division of a survivor annuity. 831.642 § 831.642 Marriage duration requirements. 831.643 § 831.643 Time for filing applications for death benefits. 831.644 § 831.644 Remarriage. 831.645 § 831.645 Elections between survivor annuities. Previous Elections at the Time of Retirement Elections at the Time of Retirement Next Organization and Structure of Regulations on Survivor Annuities Organization and Structure of Regulations on Survivor Annuities