December 09, 2013
On Monday, December 9, 2013, the President signed into law:
H.R. 3626, which extends for ten years, through December 9, 2023, the prohibitions under current law against firearms that are undetectable by metal detectors or X-ray machines.
Barack Obama, Statement by the Press Secretary on H.R. 3626 Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/309662