; 119 Stat. 3163) is hereby repealed. II Research, development, test, and evaluation A Authorization of appropriations 201. Authorization of appropriations Funds are hereby authorized to be appropriated for fiscal year 2020 for the use of the Department of Defense for research, development, test, and evaluation, as specified in the funding table in section 4201. B Program requirements, restrictions, and limitations 211. Development and acquisition strategy to procure secure, low probability of detection data link network capability (a) Strategy required Not later than March 1, 2020, the Chief of Staff of the Air Force and Chief of Naval Operations shall jointly submit to the congressional defense committees a joint development and acquisition strategy to procure a secure, low probability of detection data link network capability, with the ability to effectively operate in hostile jamming environments while preserving the low observability characteristics of the relevant platforms, including both existing and planned platforms. (b) Network characteristics The data link network capability to be procured pursuant to the development and acquisition strategy submitted under subsection (a) shall— (1) ensure that any network made with such capability will be low risk and affordable, with minimal impact or change to existing host platforms and minimal overall integration costs; (2) use a non-proprietary and open systems approach compatible with the Rapid Capabilities Office Open Mission Systems initiative of the Air Force and the Future Airborne Capability Environment initiative of the Navy; and (3) provide for an architecture to connect, with operationally relevant throughput and latency— (A) fifth-generation combat aircraft; (B) fifth-generation and fourth-generation combat aircraft; (C) fifth-generation and fourth-generation combat aircraft and appropriate support aircraft and other network nodes for command, control, communications, intelligence, surveillance, and reconnaissance purposes