Versions of 40 CFR Part 1900 - Federal Permitting Improvement on LawServer 2024 40 CFR Part 1900 – Federal Permitting Improvement 2023 40 CFR PART 1900 – FEDERAL PERMITTING IMPROVEMENT 2022 40 CFR Part 1900 – Federal Permitting Improvement 2021 40 CFR Part 1900 – Federal Permitting Improvement