Mohammed al-KhatibPerson

US State Department (Bureau of International Security and Nonproliferation) ISN sanctions — foreign persons and entities sanctioned under US nonproliferation statutes (e.g. the Iran, North Korea and Syria Nonproliferation Act, the Chemical and Biological Weapons Control Act, Executive Order 13382) for weapons-of-mass-destruction or missile proliferation activity.

What a match means: A match is a US nonproliferation sanction — procurement bans and other restrictions apply under the cited statute; treat it as a genuine sanctions hit and escalate.