strategy to end the transfer of all rocket fuels and chemical precursors for rocket fuels to the Democratic People's Republic of Korea. (c) Sense of Congress It is the sense of Congress that the United States Ambassador to the United Nations should introduce a resolution to the United Nations Security Council to request that the Panel of Experts on the Democratic People’s Republic of Korea established by United Nations Security Council Resolution 1874 (2009) investigate the importation and manufacture by the Democratic People’s Republic of Korea of rocket and ballistic missile fuels, including unsymmetrical dimethyl hydrazine, solid fuels, and other fuels or their chemical precursors. 106. Briefing and strategy relating to efforts by the Russian Federation to block enforcement of United Nations sanctions (a) Briefing required (1) In general Not later than 90 days after the date of the enactment of this Act, the Secretary of State shall brief the appropriate congressional committees on the efforts of the Russian Federation to undercut enforcement of United Nations sanctions with respect to the Democratic People’s Republic of Korea, with particular focus on the limit set by the United Nations Security Council on the supply, sale, or transfer to the Democratic People’s Republic of Korea of all refined petroleum products in excess of an aggregate amount of 500,000 barrels during any 12-month period beginning on or after January 1, 2018. (2) Elements The briefing under paragraph (1) shall include the following: (A) An assessment of the likelihood that the patterns of behavior illustrated by Annexes 1–3 to the March 5, 2019, report of the Panel of Experts established pursuant to United Nations Security Council Resolution 1874 (2009), including efforts of the Russian Federation to dismiss findings, will continue. (B) A description of steps being taken to ensure, despite the opposition of the Russian Federation, a timely decision by the United Nations Security Council to act to halt all refined petroleum product exports