Department of Homeland Security Appropriations Act, 2015 Provides FY2015 appropriations to the Department of Homeland Security (DHS). Provides appropriations for Departmental Management and Operations for the Office of the Secretary and Executive Management, the Office of the Under Secretary for Management, the Office of the Chief Financial Officer, the Office of the Chief Information Officer, Analysis and Operations, and the Office of Inspector General. Provides appropriations for Security, Enforcement, and Investigations for U.S. Customs and Border Protection, U.S. Immigration and Customs Enforcement, the Transportation Security Administration, the Coast Guard, and the U.S. Secret Service. Provides appropriations for Protection, Preparedness, Response, and Recovery for the National Protection and Programs Directorate, the Office of Health Affairs, and the Federal Emergency Management Agency. Provides appropriations for Research, Development, Training, and Services for U.S. Citizen and Immigration Services, the Federal Law Enforcement Training Center, Science and Technology, and the Domestic Nuclear Detection Office. Sets forth permissible, restricted, and prohibited uses for funds provided by this Act. Rescinds specified amounts previously appropriated to DHS.