In practice, with the exception of directives related to the common agricultural policy[?] directives are 'addressed' to all member states, and specify a date by which the states must have put the directive into effect. States frequently miss these deadlines, and where the deadlines are missed badly, the European Commission can and does commence proceedings in the European Court of Justice against the countries involved.
How each country puts the directive into effect depends on their legal structure, and may not be constant. For example, in the UK most directives are brought in via statutory instruments[?] but some directives create such major changes to the law that Parliament passes a separate Act to incorporate the changes.
wikipedia.org dumped 2003-03-17 with terodump