; 15 U.S.C. 1693o–1 ) during the immediately preceding fiscal year. (3) Investment of amounts (A) In general The Secretary of the Treasury shall invest such portion of the Security Fund as is not required to meet current withdrawals in interest-bearing obligations of the United States or in obligations guaranteed as to both principal and interest by the United States. (B) Interest and proceeds The interest on, and the proceeds from the sale or redemption of, any obligations held in the Security Fund shall be credited to the Security Fund. (4) Purposes Amounts in the Security Fund shall be available to the Secretary of Homeland Security, without further appropriation, for the following purposes: (A) The deployment of technology intended to detect and prevent unlawful crossings along the United States-Mexico border. (B) The installation of physical barriers at the southern border. (C) Wages and salaries for U.S. Border Patrol agents. (d) Rescission of excess amounts If the sum of the total funds in each of the Reimbursement Fund and the Security Fund is greater than $50,000,000,000, an amount equal to the funds in excess of $50,000,000,000 shall be— (1) permanently rescinded from such total funds; and (2) deposited in the general fund of the Treasury where such funds shall be— (A) dedicated for the sole purpose of deficit reduction; and (B) prohibited from use as an offset for other spending increases or revenue reductions. (e) Effective date This Act and the amendment made by this Act shall take effect and apply beginning on January 1, 2024.