2019—Pub. L. 115–435, title I, §101(b), Jan. 14, 2019, 132 Stat. 5532, added headings for subchapters I and II and items 311 to 315.
2011—Pub. L. 111–352, §13(a), Jan. 4, 2011, 124 Stat. 3882, added item 306 and struck out former item 306 "Strategic plans".
1993—Pub. L. 103–62, §11(a), Aug. 3, 1993, 107 Stat. 295, added item 306.