Abstract of the Presidential Policy Directive 20:
(OCEO) "can offer unique and unconventional capabilities to advance US national objectives around the world with little or no warning to the adversary or target and with potential effects ranging from subtle to severely damaging".
The government will "identify potential targets of national importance where OCEO can offer a favorable balance of effectiveness and risk as compared with other instruments of national power".
OCEO are "operations and related programs or activities … conducted by or on behalf of the United StatesGovernment, in or through cyberspace, that are intended to enable or produce cyber effects outside United States government networks."
Glenn Greenwald, Ewen MacAskill, Obama orders US to draw up overseas target list for cyber-attacks, UK, The Guardian, Friday 7, June 2013.