Id. § 2441(c)(3). As defined by the statute, a “grave breach” of Common Article 3 includes “[m]urder,” described in pertinent part as “[t]he act of a person who intentionally kills, or conspires or attempts to kill… one or more person taking no active part in the hostilities, including those placed out of combat by sickness, wounds, detention, or any other cause.” Id. § 2441(d)(1)(D).
Whatever might be the outer bounds of this category of covered persons, Common Article 3 does not alter the fundamental law of war principle concerning a belligerent party’s right in an armed conflict to target individuals who are part of an enemy’s armed forces or eliminate a nation’s authority to take legitimate action in national self-defense. The language of Common Article 3 “makes clear that members of such armed forces [of both the state and non-state parties to the conflict]… are considered as ‘taking no active part in the hostilities’ only once they have disengaged from their fighting function (‘have laid down their arms’) or are placed hors de combat; mere suspension of combat in insufficient.” International Committee of the Red Cross, Interpretive Guidance on the Notion of Direct Participation in Hostilities Under International Humanitarian Law 28 (2009). An operation against a senior operational leader of al-Qa’ida or its associated forces who poses an imminent threat of violent attack against the United States would target a person who is taking “an active part in hostilities” and therefore would not constitute a “grave breach” of Common Article 3.
V.
In conclusion, it would be lawful for the United States to conduct a lethal operation outside the United States against a U.S. citizen who is a senior, operational leader of al-Qa’ida or an associated force of al-Qa’ida without violating the Constitution or the federal statutes discussed in this white paper under the following conditions: (1) an informed, high-level official of the U. S. government has determined that the targeted individual poses an imminent threat of violent attack against the United States; (2) capture is infeasible, and the United States continues to monitor whether capture becomes feasible; and (3) the operation is conducted in a manner consistent with the four fundamental principles of the laws of war governing the use of force. As stated earlier, this paper does not attempt to determine the minimum requirements necessary to render such an operation lawful, nor does it assess what might be required to render a lethal operation against a U.S. citizen lawful in other circumstances. It concludes only that the stated conditions would be sufficient to make lawful a lethal operation in a foreign country directed against a U.S. citizen with the characteristics described above.
infliction of serious injury in violation of the 1996 Protocol on Prohibitions or Restrictions on the Use of Mines, Booby-Traps and Other Devices. 18 U.S.C. § 2441(c).
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