Versions of 26 CFR Part 40 - Excise Tax Procedural Regulations on LawServer 2024 26 CFR Part 40 – Excise Tax Procedural Regulations 2023 26 CFR PART 40 – EXCISE TAX PROCEDURAL REGULATIONS 2022 26 CFR Part 40 – Excise Tax Procedural Regulations 2021 26 CFR Part 40 – Excise Tax Procedural Regulations 2020 26 CFR Part 40 – Excise Tax Procedural Regulations