Chapter II — Department of Energy
- Subch. A Oil §§202.21 to 221.37
- Subch. B Climate Change §§300.1 to 300.13
- Subch. C Subchapter C [reserved]
- Subch. D Energy Conservation §§420.1 to 490.810
- Subch. E Alternate Fuels §§500.1 to 504.9
- Subch. G Natural Gas (economic Regulatory Administration) §§580.01 to 590.505
- Subch. H Assistance Regulations §§601.100 to 612.6
- Subch. I Sales Regulation §§622.103 to 626.9