"Although the Department of Homeland Security has been operational since January 2003 (under P.L. 107-296; H.R. 5005), due to the scope and complexity of the functions and responsibilities, the departmental components continue to be refined and realigned. The organization chart in this report is based on statutory language, reorganization plans that have been promulgated, and information from the department. Although the department has a website, the charts it presents are not yet fully representative. The report will be updated and the chart revised as events warrant."
CRS Report for Congress, RS21366