; and (2) by adding at the end the following new paragraph: (3) Subject to the approval of the Board, the Chairman may organize the staff of the Board as the Chairman considers appropriate to best accomplish the mission of the Board described in section 312(a). . 3203. Membership of Defense Nuclear Facilities Safety Board (a) List of candidates for nomination Subsection (b) of section 311 of the Atomic Energy Act of 1954 ( 42 U.S.C. 2286 ) is amended by adding at the end the following new paragraph: (4) The President shall enter into an arrangement with the National Academy of Sciences under which the National Academy shall maintain a list of individuals who meet the qualifications described in paragraph (1) to assist the President in selecting individuals to nominate for positions as members of the Board. . (b) Terms of members (1) In general Subsection (d) of such section is amended— (A) in paragraph (1), by striking the second sentence and inserting the following new sentence: A member of the Board may not serve for two consecutive terms. ; and (B) in paragraph (3), by striking the second sentence and inserting the following new sentence: A member may not serve after the expiration of the member's term. . (2) Effective date The amendments made by paragraph (1) shall take effect on April 1, 2020. (c) Filling vacancies Such subsection is further amended by adding at the end the following new paragraph: (4) (A) Not later than 180 days after the expiration of the term of a member of the Board, the President shall— (i) submit to the Senate the nomination of an individual to fill the vacancy; or (ii) submit to the Committee on Armed Services of the Senate a report that includes— (I) a description of the reasons the President did not submit such a nomination