High Quality Content by WIKIPEDIA articles! The Aviation and Transportation Security Act (ATSA, Pub.L. 107-71 November 19, 2001) was enacted by the 107th United States Congress in the immediate aftermath of the September 11, 2001 attacks. The Act created the Transportation Security Administration (TSA) within the U.S. Department of Transportation. However, with the passage of the Homeland Security Act, the TSA was later transferred to the Department of Homeland Security. The legislation (S. 1447) was sponsored by Democratic Senator Fritz Hollings and co-sponsored by 30 other Senators.