; and (2) with respect to nationals of the Republic of Korea who are employees of United States Forces Korea— (A) the United States Government should endeavor to avoid actions that negatively affect the welfare or well-being of such individuals; (B) as stated by the Commander of United States Forces Korea on March 31, 2020, the partial furlough of such individuals was heartbreaking and in no way a reflection of their performance, dedication, or conduct ; and (C) the United States Government should work with the Government of the Republic of Korea to ensure that such individuals do not bear the burden of breakdowns in negotiations regarding defense cost-sharing. 3. Strengthening the Mutual Defense Treaty (a) In general The President may not take any action to change United States policy with respect to the Mutual Defense Treaty between the United States and Republic of Korea signed on October 1, 1953, unless, not later than 120 days before the President takes such an action, the Secretary of Defense and the Secretary of State submit to the appropriate committees of Congress— (1) a detailed justification for such a change; and (2) a certification that— (A) such a change is in the national interest of the United States; and (B) an alternative diplomatic agreement or measure has been devised to replace any lost capacity or benefits resulting from such a change, including— (i) the benefits to United States national security and regional security derived from the presence of the United States Armed Forces in the Republic of Korea; (ii) the nuclear nonproliferation benefits derived from extended deterrence enhanced by the stationing of members of the United States Armed Forces in the Republic of Korea; (iii) the contributions of the Republic of Korea in— (I) countering illegitimate coercion and debt diplomacy; (II) promoting human rights; (III) promoting freedom of navigation and maritime security; (IV) protecting the environment; (V) improving global health; and (VI) assisting the victims of conflict and disaster