++++ 1. Action for failure to fulfil obligations - Evidence of failure - Burden of proof on the Commission - Methods of proof - Production of documents expurgated for reasons of confidentiality - Permissibility (EEC Treaty, Art. 169) 2. Fisheries - Conservation of the resources of the sea - Technical measures of conservation - Measures relating to the minimum mesh size of nets, attachments to nets, by-catches and the minimum size of catches - Obligations of the Member States to inspect and to take action - Failure (Council Regulations Nos 2057/82, Art. 1, and 2241/87, Art. 1)