Versions of 40 CFR 710.23 - Definitions on LawServer 2024 40 CFR 710.23 – Definitions 2023 40 CFR 710.23 – Definitions 2022 40 CFR 710.23 – Definitions 2021 40 CFR 710.23 – Definitions 2020 40 CFR 710.23 – Definitions 2019 40 CFR 710.23 – Definitions