++++ 1 . Measures adopted by the Community institutions - Regulations - Regulation derogating from earlier legislation - Effect on validity of earlier legislation - None 2 . Agriculture - Common organization of the markets - Milk and milk products - Aid for butter and concentrated butter for use in the manufacture of pastry products, ice-cream and other foodstuffs - Award of market butter to be processed into concentrated butter - Decision taken by successful tenderer on economic grounds not to process the butter but to purchase intervention butter prior to the introduction of a derogation allowing such a substitution - Forfeiture of the tendering security - Principles of proportionality and equal treatment - Whether breached - No breach - Possibility of suspending Community rules in an individual case for reasons of fairness - None ( Commission Regulations Nos 1932/81, Art . 12(1 ), and 2661/85 )