; 42 U.S.C. 1711(d) )); or (II) a United States partner; or (ii) contracting for the movement or delivery of defense articles transferred to such ally or partner through the President's drawdown authorities in connection with such response, provided that the United States is not a party to the hostilities. . B Amendments to general contracting authorities, procedures, and limitations 811. Commander initiated rapid contracting actions (a) In general The commander of a combatant command, upon providing a written determination to a supporting head (or heads) of contracting activity (HCA), may request emergency, rapid contracting response using special authorities described in subsection (b)— (1) in support of a contingency operation (as defined in section 101(a) of title 10, United States Code); (2) to facilitate the defense against or recovery from cyber, nuclear, biological, chemical, or radiological attack against the United States; (3) in support of a humanitarian or peacekeeping operation (as the term is defined in section 3015(2) of title 10, United States Code)