agreement to New START not being concluded. (7) An assessment of the impact on the United States intelligence community’s ability to accurately assess the Russian Federation's strategic nuclear arsenal and future nuclear force levels if New START is not extended or if a follow-on agreement to New START is not concluded. (b) Secretary of Defense Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense shall submit a report and provide a briefing to appropriate congressional committees that includes the following elements: (1) An assessment by the Secretary of Defense on the impact on the United States nuclear arsenal and posture if New START is not extended or a follow-on agreement is not concluded. (2) A description of the options that the United States has to respond to potential changes in the Russian Federation’s nuclear posture if the limitations contained in the New START treaty are removed. (3) A description of the adjustments to the Department of Defense budget that will be necessary if New START is not extended or a follow-on agreement is not concluded. (4) A description of the impact on strategic stability if New START is not extended or a follow-on agreement is not concluded.