# Regulation (EU) 2017/1938 of the European Parliament and of the Council of 25 October 2017 concerning measures to safeguard the security of gas supply and repealing Regulation (EU) No 994/2010 (Text with EEA relevance), Division: Demand-side definition

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

‘Deff’ means the part (in mcm/d) of Dmax that in the case of a disruption of gas supply can be sufficiently and timely covered with market-based demand-side measures in accordance with point (c) of Article 9(1) and Article 5(2).

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Source: https://www.legislation.gov.uk/eur/2017/1938/annex/II/division/4/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1938/annex-II/division-4/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.