North Korea’s national airline Air Koryo, 16 of its aircraft and 10 of its offices were designated as sanctioned entities on December 2 by the U.S. Treasury Department’s Office of Foreign Assets Control (OFAC).

According to OFAC the development means “U.S. persons are generally prohibited from engaging in transactions involving the designated persons and listed aircraft,” while “property of the designated persons in the possession or control of U.S. persons or within the United States must be blocked.”

The designation could have potentially wide-ranging consequences for individuals, companies and organizations (“persons” as defined