The National Reconnaissance Office (NRO) Acquisition Manual is hereby amended by adding new sub-part N4.21, Prohibition on Contracting for Certain Telecommunications and Video Surveillance Services or Equipment, to implement a provision of the 2019 National Defense Authorization Act prohibiting the procurement and use of covered equipment and services produced or provided by Huawei Technologies Company, ZTE Corporation, Hytera Communications Corporation, Hangzhou Hikvision Digital Technology Company, and Dahua Technology Company.