It shall be unlawful for any person—

(1) to violate any provision of title I or title II of this Act or this title ¹ (other than any provision of such titles which amend ² another law),

(2) to violate any rule, regulation, or order issued pursuant to any such provision or any provision of section 383 of this Act [42 U.S.C. 6363]; or

(3) to fail to comply with any provision prescribed in, or pursuant to, an energy conservation contingency plan which is in effect.