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.
General Explanation Of The Tax Reform Act Of 1986 (H.R.3838, 99th Congress; Public Law 99-514)
Explanation Of Technical Corrections To The Tax Reform Act Of 1984 And Other Recent Tax Legislation (Title XVIII Of H.R.3838, 99th Congress; Public Law 99-514)