CFR›Title 5›Chapter I›Part 891›Subpart A ContainsSections 891.101–891.106CorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 Subpart A—Administration and General Provisions Sections 891.101 § 891.101 Relationship to part 890 of this chapter. 891.102 § 891.102 Definitions. 891.103 § 891.103 Eligibility. 891.104 § 891.104 Responsibilities of retirement offices. 891.105 § 891.105 Correction of errors. 891.106 § 891.106 Reconsideration. Next B Subpart B—Election and Change of Election