to the operation and maintenance of programs of the Department. (4) Any science, technology, or engineering position in order to allow development of new systems and provide for the maintenance of legacy systems. (b) Sunset Effective on September 30, 2025, the authority provided under subsection (a) shall expire. . (b) Conforming and clerical amendments (1) Chapter heading The heading of chapter 99 of such title is amended to read as follows: 99 Personnel authorities for Department of Defense and Department of Homeland Security . (2) Analysis for chapter 99 The analysis for chapter 99 of such title is amended by adding at the end the following new item: 9905a. Direct hire authority for certain personnel of the Department of Homeland Security. . (3) Tables of chapters The tables of chapters at the beginning of title 5, United States Code, and at the beginning of part III of such title are each amended by striking the item relating to chapter 99 and inserting the following new item: 99. Personnel Authorities for Department of Defense and Department of Homeland Security 9901 . 419. National policy, performance evaluations, and research regarding vessel traffic service centers (a) In general Chapter 700 of title 46, United States Code, is amended— (1) by redesignating sections 70004 and 70005 as sections 70005 and 70006, respectively