; (B) underwater unmanned systems of intercontinental ranges; and (C) hypersonic glide vehicles that can be delivered by systems of intercontinental ranges; and (5) includes current and future non-strategic nuclear weapons and delivery systems. (b) Prohibition on unilateral reductions (1) In general Except as provided in paragraph (2), the President shall not reduce the size of the United States nuclear arsenal without a nuclear arms treaty approved with the advice and consent of the Senate, pursuant to article II, section 2, clause 2 of the Constitution of the United States that satisfies the requirements described in subsection (a). (2) Exception The prohibition in paragraph (1) does not apply to the following activities: (A) The maintenance or sustainment of United States nuclear systems. (B) Ensuring the safety, security, or reliability of United States nuclear systems. (C) Facilitating the transition of existing legacy systems to modern delivery systems. (c) Prohibition on bargaining with missile defense The President shall not negotiate, sign, or otherwise agree to any agreement or treaty with the Russian Federation or the People’s Republic of China that would limit or reduce the United States national or theater missile defenses unless the United States has already ratified a treaty that satisfies the requirements described in subsection (a). (d) Withholding of funds Beginning on the date that is one year after the date of the enactment of this Act, no funds shall be expended to implement the New START Treaty, any successor agreement to the New START Treaty, or any other new or newly amended nuclear arms control treaty or agreement with the Russian Federation that limits the numbers of nuclear warheads or nuclear-capable delivery systems possessed by the United States unless— (1) such treaties or agreements satisfy the requirements described in subsection (a)