; (iv) provides authority to a single individual to certify compliance of Department information systems and information technology services with all current cybersecurity standards; and (v) support efficient coordination across the military departments and services, the Office of the Secretary of Defense, the Defense Information Systems Agency, and United States Cyber Command. (f) Briefing Not later than February 1, 2021, each Secretary of a military department shall brief the congressional defense committees on the findings of the Secretary with respect to the review conducted by the Secretary under subsection (e). 1648. Designation of test networks for testing and accreditation of cybersecurity products and services (a) Designation Not later than April 1, 2020, the Secretary of Defense shall designate, for use by the Defense Information Systems Agency and such other components of the Department of Defense as the Secretary considers appropriate, three test networks for the testing and accreditation of cybersecurity products and services. (b) Requirements The networks designated under subsection (a) shall— (1) be of sufficient scale to realistically test cybersecurity products and services; (2) feature substantially different architectures and configurations; (3) be live, operational networks