Memorandum of Agreement Among the United States General Services Administration, the Advisory Council on Historic Preservation, the District of Columbia State Historic Preservation Office, the National Capital Planning Commission, and the United States Department of Homeland Security Regarding the Adaptive Use of the Center Building (Buildings 1-6 and 8) as the Office of the Secretary of the United States Department of Homeland Security St. Elizabeths National Historic Landmark, Washington, D.C. 

• Amendment #1 (2016) 
• Amendment #2 (2020)