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A CTC/Level 1B clearance must be formally reviewed after ten years (five years for non-List X Contractors). [1]: Annex B In the transport sector security vetting requirements, including for Counter Terrorist Check, is regulated by the Department of Transport. [6] A CTC/Level 1B is required for police officers and many associated staff. [7]
Classified information in the United Kingdom is a system used to protect information from intentional or inadvertent release to unauthorised readers. The system is organised by the Cabinet Office and is implemented throughout central and local government and critical national infrastructure .
The term has been used since the 1930s and is equivalent to facility security clearance (FSC) used in other countries. Locations with this status are those normally involved with defence research and manufacturing that is vital to national security. The complete list of sites is itself classified.
The UK prefix is added to the security classification of all assets sent to foreign governments or international organisations. This prefix designates the UK as the originating country and that the British Government should be consulted before any possible disclosure. [2] National caveats follow the security classification.
After the United States entered into World War II, Britain changed its security classifications to match those of the U.S..Previously, classifications had included the top classification "Most Secret", but it soon became apparent that the United States did not fully understand the UK's classifications, and classified information appeared in the U.S.'s press.
Until 2013, the United Kingdom used five levels of classification—from lowest to highest, they were: Protect, Restricted, Confidential, Secret and Top Secret (formerly Most Secret). The Cabinet Office provides guidance on how to protect information, including the security clearances required for personnel.
The British Official Secrets Act 1889 (52 & 53 Vict. c. 52) was adopted in Canada with minor modifications in 1890. Its provisions became part of the Criminal Code in 1892. . The Official Secrets Act (Canada) 1939 replaced the Criminal Code provisions and utilised the provisions of the British Official Secrets Acts 1911 and 1
Eyes only is jargon used with regard to classified information.Whereas a classified document is normally intended to be available to readers with the appropriate security clearance and a need to know, an "eyes only" designation, whether official or informal, indicates that the document is intended only for a specific set of readers.