The Decision on Criteria and Methodological Standards on Good Environmental Status of Marine Waters provides the conceptual framework for the assessment and valuation of the marine waters of EU Member States. In particular, it provides concepts for defining what constitutes good marine environmental status – a status which Member States are obligated to achieve by the year 2020 under the 2008 Marine Strategy Framework Directive. This article aims to elucidate the epistemic and normative dimensions of scientific criteria and methodological standards, as well as their importance in the legal treatment of the marine environment of the EU. The article also assesses how and to what extent the transnational process leading up to the Decision was structured, surveying existing ideas and perspectives as to what exactly constitutes good environmental status, and examining whether the structure of the Decision ensures that those affected by it would want to accept it.
