# Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services, Division (2)

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

The MarineExtent of a Sea spatial object shall have a waterlevel value equal to ‘MeanHighWater’, unless there is no appreciable change in the Sea extent due to tides, in which case a value of ‘MeanSeaLevel’ may be used.

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Source: https://www.legislation.gov.uk/eur/2010/1089/annex/IV/division/15/division/15.4/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2010-1089/annex-IV/division-15/division-15.4/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.