; or (B) separate private wireless network and public wireless network infrastructure at such installation or other facility (which shall include a determination by the Secretary on how to establish roaming agreements and policies between such networks). (4) Briefing Not later than 150 days after the date of the enactment of this Act, the Secretary shall provide to the congressional defense committees a briefing on the strategy developed under paragraph (1) and any other activity carried out pursuant to this subsection. (b) International cooperation activities The Secretary, using existing authorities available to the Secretary, may engage in cooperation activities with foreign allies and partners of the United States to— (1) improve the implementation of the strategy under subsection (a)(1)