shall be considered an agency of the United States Government. III DEPARTMENT OF DEFENSE Operation and maintenance, marine corps For an additional amount for Operation and Maintenance, Marine Corps , $200,000,000, for necessary expenses related to the consequences of Hurricanes Michael and Florence: Provided , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985: Provided further , That notwithstanding section 284 of title 10, United States Code, or any other provision of law, funds made available under this heading may only be used for the purposes specifically described under this heading. Operation and maintenance, air force For an additional amount for Operation and Maintenance, Air Force , $400,000,000, for necessary expenses related to the consequences of Hurricanes Michael and Florence: Provided , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985: Provided further , That notwithstanding section 284 of title 10, United States Code, or any other provision of law, funds made available under this heading may only be used for the purposes specifically described under this heading. IV CORPS OF ENGINEERS—CIVIL DEPARTMENT OF THE ARMY INVESTIGATIONS For an additional amount for Investigations for necessary expenses related to the completion, or initiation and completion, of flood and storm damage reduction, including shore protection, studies which are currently authorized or which are authorized after the date of enactment of this Act, to reduce risk from future floods and hurricanes, at full Federal expense, $35,000,000, to remain available until expended, in States and insular areas that were impacted by Hurricanes Florence and Michael, Typhoon Mangkhut, Super Typhoon Yutu, and Tropical Storm Gita: Provided , That such amount is designated by the