The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
Under authority of the Reorganization Act of 1939 (5 U.S.C. 133-133r, 133t note), various agencies were transferred to the Executive Office of the President by the President's Reorganization Plans I and II of 1939 (5 U.S.C. app.), effective July 1, 1939. Executive Order 8248 of September 8, 1939, established the divisions of the Executive Office and defined their functions. Subsequently, Presidents have used Executive orders, reorganization plans, and legislative initiatives to reorganize the Executive Office to make its composition compatible with the goals of their administrations.