++++ ACTION FOR A DECLARATION THAT A MEASURE IS VOID - NATURAL AND LEGAL PERSONS - MEASURES OF DIRECT AND INDIVIDUAL CONCERN TO THEM - REGULATION LAYING DOWN DETAILED RULES FOR THE APPLICATION OF THE CO-RESPONSIBILITY LEVY IN THE CEREALS SECTOR ( EEC TREATY, SECOND PARAGRAPH OF ART . 173 AND ART . 189; COMMISSION REGULATION NO 2040/86 )