CHAPTER II—DEPARTMENT OF ENERGY
- SUBCHAPTER A—OIL (parts 200 to 221)
- SUBCHAPTER B—CLIMATE CHANGE (parts 300 to 300)
- SUBCHAPTER D—ENERGY CONSERVATION (parts 400 to 491)
- SUBCHAPTER E—ALTERNATE FUELS (parts 500 to 516)
- SUBCHAPTER G—NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) (parts 580 to 590)
- SUBCHAPTER H—ASSISTANCE REGULATIONS (parts 600 to 611)
- SUBCHAPTER I—SALES REGULATION (parts 622 to 626)