pursuant to a transfer authority provided under this heading shall be merged with and available for the same purposes and for the same time period as the appropriations to which the funds are transferred: Provided further, That the Secretary of Defense shall notify the congressional defense committees of the details of such transfers not less than 15 days before any such transfer: Provided further, That upon a determination that all or part of the funds transferred from this appropriation are not necessary for the purposes provided under this heading, such amounts may be transferred back and merged with this appropriation: Provided further, That amounts may be transferred between appropriations made under this heading: Provided further, That any transfer authority provided under this heading is in addition to any other transfer authority provided by law: Provided further, That such amount in this paragraph is designated by Congress as an emergency requirement pursuant to section 251(b)(2)(A) of the Balanced Budget and Emergency Deficit Control Act of 1985, as amended: Provided further, That such amounts shall be available only if the President designates such amount as an emergency requirement pursuant to section 251(b)(2)(A). Procurement Procurement of ammunition, Army For an additional amount for Procurement of Ammunition, Army , $801,400,000, to remain available until September 30, 2026, to respond to the situation in Israel and for related expenses: Provided, That such amount is designated by the Congress as an emergency requirement pursuant to section 251(b)(2)(A) of the Balanced Budget and Emergency Deficit Control Act of 1985, as amended: Provided further, That such amount shall be available only if the President designates such amount as an emergency requirement pursuant to section 251(b)(2)(A). Procurement, Defense-wide For an additional amount for Procurement, Defense-wide , $4,000,000,000, to remain available until September 30, 2027, for the Secretary of Defense to provide to the Government of Israel