2024 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > definition; tax imposed

2023 CFR > Title 26 > CHAPTER I > SUBCHAPTER A > PART 1 > definition; tax imposed

2022 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > Definition; Tax Imposed – Definition; Tax Imposed

2021 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > definition; tax imposed – definition; tax imposed