; (2) in the case of a violation of paragraph (1)(A), (1)(B), (1)(C), or (5) of that subsection, shall be imprisoned for not more than 10 years, fined under this title, or both; (3) subject to paragraph (4) of this subsection, in the case of a violation of paragraph (1)(D) of that subsection, shall be imprisoned for not more than 20 years, fined under this title, or both; and (4) in the case of a violation of any paragraph of that subsection, if death results, shall be sentenced to death or imprisoned for any term of years or for life, fined under this title, or both. (e) Inchoate offenses (1) In general Whoever threatens, attempts, or conspires to commit an offense under subsection (b) shall be subject to the same punishment under subsection (d) as for a completed offense. (2) Federal jurisdiction In the case of a threat, attempt, or conspiracy to commit an offense under subsection (b), the requirement that a circumstance described in subsection (c) exists shall be satisfied if any of the circumstances described in that subsection would have existed had the offense been carried out. (f) Exceptions (1) Government-authorized conduct Subsection (b) shall not apply to conduct by or under the authority of, authorized by, or pursuant to a contract with, the United States or a State, Tribal, or local government, or any department or agency of the United States or a State, Tribal, or local government. (2) Weaponization for authorized or licensed activities Subsection (b)(1), as that subsection applies to firearms, explosives, and other dangerous weapons, shall not apply to— (A) conduct related to avalanche mitigation