Public Law 114-150: Department of Homeland Security Headquarters Consolidation Accountability Act of 2015 [open pdf - 202KB]
According to this Congressional issuance: "Not later than 120 days after the date of enactment of this Act, the Secretary, in coordination with the Administrator, shall submit to the appropriate committees of Congress information on the implementation of the enhanced plan for the Department headquarters consolidation project within the National Capital Region, approved by the Office of Management and Budget and included in the budget of the President for fiscal year 2016 (as submitted to Congress under section 1105(a) of title 31, United States Code), that includes the following: (1) A proposed occupancy plan for the consolidation project that includes specific information about which Department-wide operations, component operations, and support offices will be located at the site, the aggregate number of full time equivalent employees projected to occupy the site, the seat-to-staff ratio at the site, and schedule estimates for migrating operations to the site. (2) A comprehensive assessment of the difference between the current real property and facilities needed by the Department in the National Capital Region in order to carry out the mission of the Department and the future needs of the Department. (3) A current plan for construction of the headquarters consolidation at the St. Elizabeths campus[...]."
Public Law 114-150
Government Printing Office: http://www.gpo.gov/