CFR > Title 18 - Conservation of Power and Water Resources > CHAPTER I—FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY > SUBCHAPTER I—OTHER REGULATIONS UNDER THE NATURAL GAS POLICY ACT OF 1978 AND RELATED AUTHORITIES (parts 280 to 286) > PART 281—NATURAL GAS CURTAILMENT UNDER THE NATURAL GAS POLICY ACT OF 1978 > SUBPART C—Alternative Fuel Determination (§281.301 to §281.305)