December 31, 2011
On Saturday, December 31, 2011, the President signed into law:
H.R. 1540, the "National Defense Authorization Act for Fiscal Year 2012," which authorizes FY 2012 appropriations for Department of Defense programs and military construction, Department of Energy national security programs, and Department of Transportation maritime security programs.
Barack Obama, Statement by the Press Secretary on H.R. 1540 Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/309760