++++ 1.Measures adopted by Community institutions - Directives - Implementation by Member States - Transposition of a directive without the enactment of legislation - Conditions - Existence of a general legal context ensuring full application of the directive - Mere administrative practices insufficient ( EEC Treaty, Art . 189, third paragraph ) 2.Environment - Conservation of wild birds - Directive 79/409 - Implementation by Member States - Conditions for the grant of derogations from the prohibitions laid down in the directive ( Council Directive 79/409, Arts 5 and 9 ) 3.Environment - Conservation of wild birds - Directive 79/409 - Implementation by Member States - Obligation to impose express prohibitions of means of hunting and methods of killing prohibited by the directive - Means and methods unknown in the Member States in question - Irrelevant ( Council Directive 79/409, Arts 5 and 8, Annex IV )