Subchapter A — Tax on Petroleum (Sections 4611 to 4612)
Subchapter B — Tax on Certain Chemicals (Sections 4661 to 4662)
Subchapter C — Tax on Certain Imported Substances (Sections 4671 to 4672)
Subchapter D — Ozone Depleting Chemicals, Etc. (Sections 4681 to 4682)
