; and (2) for which the attorney general of the State (or comparable Tribal official) submits a written certification to the Assistant Attorney General stating that the law of the State or Indian Tribe reflects the sense of Congress in section 922(z)(4)(D) of such title 18. . 5. Sense of Congress Paragraph (4) of section 922(z) of title 18, United States Code, as added by section 3, is amended by adding at the end the following: (D) Sense of Congress relating to liability It is the sense of Congress that— (i) failure to comply with subparagraph (A) constitutes negligence under any relevant statute or common law rule; and (ii) when a violation of subparagraph (A) is the but-for cause of a harm caused by the discharge of a firearm, such violation should be deemed to be the legal or proximate cause of such harm, regardless of whether such harm was also the result of an intentional tort. . 6. Severability If any provision of this Act, or an amendment made by this Act, or the application of such provision to any person or circumstance, is held to be invalid, the remainder of this Act, or an amendment made by this Act, or the application of such provision to other persons or circumstances, shall not be affected.