++++ 1 . MEASURES ADOPTED BY AN INSTITUTION - DEFINITIVE NATURE - CRITERIA 2 . PROCEDURE - JUDGMENT GRANTING ANNULMENT - LEGAL EFFECTS - LIMITED TO THE PARTIES AND TO THE PERSONS DIRECTLY CONCERNED BY THE MEASURE ANNULLED - JUDGMENT CONSTITUTING A NEW FACTOR - CONCEPT 3 . MEASURES ADOPTED BY AN INSTITUTION - ANNULMENT DEPENDENT ON A NEW FACTOR - CRITERIA - PRINCIPLE OF LEGAL CERTAINTY TO BE TAKEN INTO CONSIDERATION