; and (ii) a detailed timeline to achieve the intended force structure and posture described in subparagraph (A). (3) Form The report required under paragraph (1) may be submitted in classified form, but shall include an unclassified summary. (4) Availability On submittal of the report to the congressional defense committees, the Commander of United States Indo-Pacific Command shall make the report available to the Secretary of Defense, the Director of Cost Assessment and Program Evaluation, the Chairman of the Joint Chiefs of Staff, the Secretaries of the military departments, and the chiefs of staff of each military service. (b) Briefings required (1) Initial briefing Not later than March 15, 2020, the Secretary of Defense, the Director of Cost Assessment and Program Evaluation, and the Chairman of the Joint Chiefs of Staff shall provide to the congressional defense committees a joint briefing, and documents as appropriate, with respect to their assessments of the report submitted under subsection (a), including their assessments of the feasibility and advisability of the plan required by paragraph (2)(F) of that subsection. (2) Subsequent briefing Not later than March 31, 2020, the Secretary of the Air Force, the Secretary of the Army, and the Secretary of the Navy shall provide to the congressional defense committees a joint briefing, and documents as appropriate, with respect to their assessments of the report submitted under subsection (a), including their assessments of the feasibility and advisability of the plan required by paragraph (2)(F) of that subsection. 1255. Report on distributed lay-down of United States forces in the Indo-Pacific region (a) Review Acknowledging the pressing need to reduce the presence of the United States Marine Corps on Okinawa, Japan, and to accelerate adjustments to United States force posture in the Indo-Pacific region, the Secretary of Defense, in consultation with the Government of Japan and other foreign governments as necessary, shall conduct a review of the planned