# Commission Regulation (EC) No 1737/2006 of 7 November 2006 laying down detailed rules for the implementation of Regulation (EC) No 2152/2003 of the European Parliament and of the Council concerning monitoring of forests and environmental interactions in the Community, Division (25): Diameter at breast height (DBH)

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

The diameter at breast height (1,30 m) over bark in 0,1 centimetre.
When a diameter tape is used a single value will be needed. When calipers are used the maximum and the minimum diameter (over bark) shall be determined and reported (diameter 1 and diameter 2).

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/15/division/4/division/25 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-15/division-4/division-25
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.