# Commission Implementing Regulation (EU) No 433/2012 of 23 May 2012 laying down detailed rules for the application of Regulation (EU) No 1236/2010 of the European Parliament and of the Council laying down a scheme of control and enforcement applicable in the area covered by the Convention on future multilateral cooperation in the North-East Atlantic fisheries, Division 2: Each data transmission shall be structured as follows:

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

a double slash (‘//’) and the characters ‘SR’ indicate the start of a message;
a double slash (‘//’) and field code indicate the start of a data element;
a single slash (‘/’) separates the field code and the data;
pairs of data are separated by space;
the characters ‘ER’ and a double slash (‘//’) indicate the end of a record.

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Source: https://www.legislation.gov.uk/eur/2012/433/annex/X/division/A/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-433/annex-X/division-A/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.