# Council Decision of 23 September 2013 on the security rules for protecting EU classified information (2013/488/EU), Division 40: EUCI may be transmitted using cryptographic products which have been approved for a lower classification level or without encryption with the consent of the competent authority if any delay would cause harm clearly outweighing the harm entailed by any disclosure of the classified material and if:

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

(a) the sender and recipient do not have the required encryption facility or have no encryption facility; and
(b) the classified material cannot be conveyed in time by other means.

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Source: https://www.legislation.gov.uk/eudn/2013/488/annex/IV/division/II/division/12/division/40 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-488/annex-IV/division-II/division-12/division-40
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.