The bill terminates the All-domain Anomaly Resolution Office of the Department of Defense, transferring its functions as determined by the Secretary. It prohibits the establishment of a similar office with centralized authority over unidentified anomalous phenomena within the Department of Defense or the Office of the Director of National Intelligence. The bill repeals specific sections related to the Office. It also amends related sections in various National Defense Authorization Acts. The effective date of these changes is 60 days after the enactment of the Act. The bill defines "transmedium objects or devices" as those transitioning between space, atmosphere, or bodies of water, and "unidentified anomalous phenomena" as airborne, transmedium, or submerged objects displaying unidentifiable behavior.