; (B) electronic warfare; or (C) information warfare operations; and (2) is required in the national interest of the United States. (c) Waiver The head of an executive agency may waive the prohibition under subsection (a) on a case-by-case basis with the approval of the Secretary of Homeland Security or the Secretary of Defense and notification to Congress. (d) Regulations Not later than 180 days after the date of the enactment of this Act, the Secretary of Homeland Security shall prescribe regulations to implement this section. 5. Prohibition on use of Federal funds for purchases and operation of commercial off-the-shelf drones and unmanned aircraft systems from China No Federal funds awarded through a contract, grant, or cooperative agreement or otherwise made available may be used to purchase a commercial off-the-shelf drone or covered unmanned aircraft system, or a system to counter unmanned aircraft systems, that is manufactured or assembled by a covered foreign entity or in connection with the operation of such a drone or system. 6. Comptroller General report Not later than 90 days after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report on the amount of commercial off-the-shelf drones and covered unmanned aircraft systems procured by Federal departments and agencies from covered foreign entities.