United States Code, 2006 edition : containing the general and permanent laws of the United States enacted through the 109th Congress : (ending January 3, 2007, the last law of which was signed on January 15, 2007) / prepared and published under authority of Title 2, U. S. Code, Section 285b, by the Office of the Law Revision Counsel of the House of Representatives. Vol. 30 : Title 49 ― Transportation §§ 40101―end to Title 50 ― War and national defense