by subsection (a) is submitted, and every 180 days thereafter, the written update required under paragraph (1) of subsection (c) shall include, in addition to the information required by subparagraphs (A) through (E) of that subsection, the following for the preceding 180-day period: (1) An assessment of the establishment of safeguards, other control mechanisms, and other assurances secured from the Democratic People's Republic of Korea to ensure the activities of the Democratic People's Republic of Korea permitted under any agreement will not be used to further any nuclear-related military or nuclear explosive purpose, including research on or development of a nuclear explosive device. (2) An assessment of the capacity of the United States or an international organization, including the International Atomic Energy Agency, to effectively access and investigate suspicious sites in the Democratic People's Republic of Korea or allegations of covert nuclear-related activities, including storage sites for nuclear weapons. (e) Sunset The section shall cease to be effective on the date that is three years after the date of the enactment of this Act. (f) Appropriate committees of Congress defined In this section, the term appropriate committees of Congress means— (1) the Committee on Armed Services, the Select Committee on Intelligence, the Committee on Foreign Relations, and the Committee on Appropriations of the Senate