One of the principal mechanisms for delivering the objectives
of the Habitats Directive is the designation of SACs and the
implementation of appropriate conservation measures on these sites.
These measures are described in Article 6 of the Directive, and
guidance on their interpretation has been provided by the European
Commission (
2000,
2001).
SAC designation requires Member States to establish conservation
measures which correspond to the ecological requirements of Annex I
habitats and Annex II species present on the site (Article 6.1),
and to take appropriate steps to avoid deterioration of the natural
habitats and habitats of species, as well as significant
disturbance of species, for which the site is designated (Article
6.2). This includes the appropriate assessment of the implications
of any plans or projects that, alone or in combination, are likely
to have a significant effect on the site in view of the site's
conservation objectives (Article 6.3). If a negative assessment is
concluded, a plan or project can only proceed if it is for
imperative reasons of overriding public interest and no alternative
solutions are possible, and the Member State must take compensatory
measures to ensure the overall coherence of the Natura 2000 network
(Article 6.4).