a final decision of a district court of the United States in a civil action brought under this section. (2) Filing deadline A party shall file an appeal under paragraph (1) not later than 30 days after the court issues a final decision under subsection (a). . (b) Technical and conforming amendment The table of sections at the beginning of chapter 13 of title 10, United States Code, as amended by section 6, is further amended by adding at the end the following: 258. Judicial review. . 8. Restriction on direct participation by military personnel Section 275 of title 10, United States Code, is amended to read as follows: 275. Restriction on direct participation by military personnel (a) In general No activity (including the provision of any equipment or facility or the assignment or detail of any personnel) under this title shall include or permit direct participation by a member of the Army, Navy, Air Force, or Marine Corps in a search, seizure, arrest, or other similar activity unless participation in such activity by such member is otherwise expressly authorized by law. (b) Regulations The Secretary of Defense shall prescribe such regulations as may be necessary to ensure compliance with subsection (a). .