Subpart I. Increased Annuities. § 38–2023.01. Annuity increase. § 38–2023.02. Annuity for unremarried widow or widower. § 38–2023.03. Effective dates of annuities provided by §§ 38-2023.01 and 38-2023.02; computation. § 38–2023.04. Payment of annuity increase.