Versions of 14 CFR Part 1 - Definitions and Abbreviations on LawServer 2024 14 CFR Part 1 – Definitions and Abbreviations 2023 14 CFR PART 1 – DEFINITIONS AND ABBREVIATIONS 2022 14 CFR Part 1 – Definitions and Abbreviations 2021 14 CFR Part 1 – Definitions and Abbreviations 2020 14 CFR Part 1 – Definitions and Abbreviations