For anyone curious enough. Power is vested via 22 USC § 2318. Fun fact. Since 1988 this power has been invoked 59 times. 25 of the times have been for the Ukraine-Russia war. And of course twice for Israel just this year alone. For those doing the napkin math here, out of ALL of the times this power has been cited by a President (or related officer), 47% of them have been under Biden. Just FYI.