++++ 1. Actions for annulment ° Actionable measures ° Acts intended to have legal effects ° Commission communication presented as designed to specify the manner of application of a directive but creating new obligations for the Member States (EEC Treaty, Art. 173; Commission Directive 80/723, Art. 5(2); Commission communication of 18 October 1991) 2. Community law ° Principles ° Legal certainty ° Community legislation ° Requirement for clarity and foreseeability ° Express indication of the legal basis