# Council Decision of 23 September 2013 on the security rules for protecting EU classified information (2013/488/EU), Division 28: EUCI which is classified TRÈS SECRET UE/EU TOP SECRET shall be stored in a Secured Area under one of the following conditions:

Extent: E+W+S+N.I.

(a) in a security container in line with paragraph 8 with at least one of the following supplementary controls:
(i) continuous protection or verification by cleared security staff or duty personnel;
(ii) an approved IDS in combination with response security personnel;
(b) in an IDS-equipped strong room in combination with response security personnel.

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Source: https://www.legislation.gov.uk/eudn/2013/488/annex/II/division/V/division/28 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-488/annex-II/division-V/division-28
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.