; and (2) provide management oversight and supervision of the military departments to ensure military systems that emit and receive radio frequencies are protected against threats and interference from United States and foreign adversary military systems operating in the same or adjacent radio frequencies. (b) Specific required actions The Secretary of Defense shall require the military departments and combat support agencies to carry out the following activities: (1) Not later than 270 days after the date of the enactment of this Act, develop and approve requirements, through the Joint Requirements Oversight Council as appropriate, for every radar, signals intelligence, navigation, and communications system and subsystem subject to the Global Force Management process to ensure such systems and subsystems are able to withstand threat-realistic levels of jamming, spoofing, and unintended interference, including self-generated interference. (2) Not less frequently than once every 4 years, test each system and subsystem described in paragraph (1) at a test range that permits threat-realistic electronic warfare attacks against the system or subsystem by a red team or simulated opposition force, with the first set of highest priority systems to be initially tested by not later than the end of fiscal year 2025. (3) With respect to each system and subsystem described in paragraph (1) that fails to meet electronic protection requirements during testing conducted under paragraph (2)— (A) not later than 3 years after the initial failed test, retrofit the system or subsystem with electronic protection measures that can withstand threat-realistic jamming, spoofing, and unintended interference