; (2) by inserting after paragraph (3) the following new paragraph (4): (4) establishing policies for, and providing oversight, guidance, and coordination with respect to, the nuclear command, control, and communications system; ; and (3) in paragraph (6), as redesignated by paragraph (1), by inserting after overseeing the modernization of nuclear forces the following: , including the nuclear command, control, and communications system, . (b) Duties and responsibilities of chief information officer Section 142(b)(1) of such title is amended— (1) by striking subparagraph (G); and (2) by redesignating subparagraphs (H) and (I) as subparagraphs (G) and (H), respectively. 1662. Expansion of officials required to conduct biennial assessments of delivery platforms for nuclear weapons and nuclear command and control system Section 492(d) of title 10, United States Code, is amended— (1) in paragraph (2), by striking ; and and inserting a semicolon; (2) in paragraph (3), by striking the period at the end and inserting ; and ; and (3) by adding at the end the following: (4) the Commander of the United States Air Forces in Europe. . 1663. Conforming amendment to Council on Oversight of the National Leadership Command, Control, and Communications System Section 171a of title 10, United States Code, is amended by striking , Technology, and Logistics each place it appears and inserting and Sustainment . 1664. Prohibition on reduction of the intercontinental ballistic missiles of the United States (a) Prohibition Except as provided by subsection (b), none of the funds authorized to be appropriated by this Act or otherwise made available for fiscal year 2020 for the Department of Defense shall be obligated or expended for— (1) reducing, or preparing to reduce, the responsiveness or alert level of the intercontinental ballistic missiles of the United States