1. Short title This Act may be cited as the TSP Fiduciary Security Act of 2023 . 2. Findings Congress finds the following: (1) The Federal Retirement Thrift Investment Board has a fiduciary duty to manage the Thrift Savings Fund in the best interest of the beneficiaries of the Fund. (2) The principal beneficiaries of the Thrift Savings Fund are the civil servants of the United States, and members of the uniformed services, who are tasked with defending the national security of the United States. (3) The duty of the Federal Retirement Thrift Investment Board to manage the Thrift Savings Fund in the best interests of the beneficiaries of the Fund includes a duty not to harm the national security of the United States. 3. Fiduciary responsibilities with respect to Thrift Savings Fund Section 8477 of title 5, United States Code, is amended— (1) in subsection (b)(1)— (A) in subparagraph (B), by striking ; and and inserting a semicolon; (B) in subparagraph (C), by striking the period at the end and inserting ; and ; and (C) by adding at the end the following: (D) to the maximum extent practicable, by preventing the investments of the Thrift Savings Fund (or portions thereof), and the exercise of voting rights associated with any such investments, from harming the national security of the United States. ; and (2) in subsection (e), by adding at the end the following: (9) (A) Notwithstanding any other provision of this subsection, no fiduciary shall be personally liable for any monetary damages, or be assessed any civil penalty, under this subsection with respect to a breach of the requirement under subsection (b)(1)(D). (B) Subparagraph (A) shall cease to have effect beginning on January 1, 2025. . 4. Review of Thrift Savings Fund for compliance with fiduciary duties (a) In general Section 8477(f) of title 5, United States Code, is amended— (1) by inserting (1) after (f)