1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - MILK AND MILK PRODUCTS - BUTTER HELD IN PUBLIC STORAGE - SALE AT A REDUCED PRICE TO PROCESSING UNDERTAKINGS - DATE ON WHICH THE SUCCESSFUL TENDERER TAKES OVER THE BUTTER - CONCEPT - PROOF OF TAKING OVER - RULES ( REGULATION NO 232/75 OF THE COMMISSION , ART . 6 ( 1 ) ( D ) AND ART . 18 ( 2 ) ( D )) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - MILK AND MILK PRODUCTS - BUTTER HELD IN PUBLIC STORAGE - SALE AT A REDUCED PRICE TO PROCESSING UNDERTAKINGS - RULES ON SECURITY - FORCE MAJEURE - CONCEPT - RESALE OF THE BUTTER BY THE SUCCESSFUL TENDERER - EXTENSION OF THE PROCESSING PERIOD GRANTED TO THE BUYER BY AN AUTHORITY WITH NO POWER TO GRANT EXTENSIONS - NOT POSSIBLE FOR THE SUCCESSFUL TENDERER TO PLEAD FORCE MAJEURE ( REGULATION NO 232/75 OF THE COMMISSION , ART . 18 AND ART . 19 ( 1 )) 3 . COMMUNITY LAW - PRINCIPLES - PROPORTIONALITY - WHETHER A MEASURE IS PROPORTIONATE TO ITS AIM - CRITERIA OF ASSESSMENT 4 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - MILK AND MILK PRODUCTS - BUTTER HELD IN PUBLIC STORAGE - SALE AT A REDUCED PRICE TO PROCESSING UNDERTAKINGS - RULES ON SECURITY - PROCESSING PERIOD - EXTENSION - CONDITIONS - SUBMISSION OF AN APPLICATION WITHIN 30 DAYS - PRINCIPLE OF PROPORTIONALITY - BREACH - NONE ( REGULATION NO 232/75 OF THE COMMISSION , SECOND SUBPARAGRAPH OF ARTICLE 19 ( 2 ))