U.S. Code / Title 6 — Domestic Security / Chapter 4—Transportation Security / Subchapter Iv—Surface Transportation SecurityTitle 6PartPart A—General ProvisionsContents§ 1151. Definitions§ 1152. Oversight and grant procedures§ 1153. Authorization of appropriations§ 1154. Public awareness§ 1155. Security awareness program§ 1156. Nuclear material and explosive detection technology