- Part A—Establishment of System (§§ 2011 – 2014)
- Part B—Contributions (§ 2021)
- Part C—Computation of Annuities (§§ 2031 – 2036)
- Part D—Benefits Accruing to Certain Participants (§§ 2051 – 2056)
- Part E—Lump-Sum Payments (§ 2071)
- Part F—Period of Service for Annuities (§§ 2081 – 2083)
- Part G—Moneys (§§ 2091 – 2095)
- Part H—Retired Participants Recalled, Reinstated, or Reappointed in Agency or Reemployed in Government (§§ 2111 – 2113)
- Part I—Voluntary Contributions (§ 2121)
- Part J—Cost-of-Living Adjustment of Annuities (§ 2131)
- Part K—Conformity With Civil Service Retirement System (§§ 2141 – 2144)