You may be thinking of the abbreviation NDAA, which applies in the USA and is the National Defence Authorisation Act.
Essentially the USA Government implemented Laws to prevent devices (mainly) of Chinese origin [Made in China, or made with components from China] being installed pretty much anywhere in the USA.
The term NDAA has been widely adopted (even though it is not applicable to the UK), we at use-IP created categories of NDAA compliant products to help people browse and select:
NDAA Compliant Cameras
NDAA Compliant NVRs
NDAA Compliant Network Accessories
In the UK it is much less clear.
Hikvision recently provided the attached clarification letter, to which they attach a letter from the UK Government declaring that restrictions to the use of Hikvision products in the UK as covered by the UK Government's procurement policy applies ONLY to "sensitive sites of the central government estate" e.g. defence & intelligence facilities.
Put another way, the letters clarified that there is currently no general ban of Hikvision products in the UK.