The designation, authorized under Executive Order 13224, targets terrorists and supporters of terrorists or acts of terrorism. The State Department described the terrorist acts committed by Dale in its Tuesday announcement.
"Anders Dale is a Norwegian citizen who traveled to Yemen to join al-Qa'ida in the Arabian Peninsula (AQAP). Dale made his first trip to Yemen in 2008, returning multiple times until his final trip in December 2011. As part of AQAP, Dale has received terrorist training and was taught to make bomb-belts, improvised explosive devices, and larger explosives used in car bombs."
The designation bars U.S. persons from doing business with Dale, and any property he holds within the U.S. will be frozen.
AQAP was designated a "foreign terrorist organization" in January 2010.