granted, including the justification for such exception. 6. Headquarters buildings (a) Headquarters consolidations Not later than 1 year after the date of enactment of this Act, the Director, in consultation with the Administrator, shall submit to the Committee on Transportation and Infrastructure of the House of Representatives, the Committee on Environment and Public Works of the Senate, and the Comptroller General of the United States a plan to consolidate department and agency headquarters buildings in the National Capital Region that will result in building utilizations of 60 percent or greater. (b) Contents The plan submitted under subsection (a) shall include details on the following: (1) Which departments and agencies will collocate and consolidate and into which buildings and associated details before and after plan implementation related to building utilization, building capacities, and actual utilization. (2) Details on the strategies for the sale or disposal of buildings that will no longer be needed for Federal use. (3) A detailed breakdown of any costs associated with the proposed consolidations and collocations. (4) An estimate of future savings as a result of space reductions and consolidations, including costs associated with energy savings and building operations. (c) Implementation Not later than 1 year after the submission of the plan under subsection (a), the Administrator and Director shall begin implementing such plan. 7. Federal Use it or Lose it Leases Act (a) Reporting of space utilization and occupancy data for office space An occupancy agreement between the Administrator of General Services and a Federal tenant for office space shall— (1) include language that requires the Federal tenant to submit to the Administrator an annual report for the duration of the agreement containing data on— (A) monthly total occupancy of such office space