++++ Agriculture - Common organization of the markets - Milk and milk products - Special aid for skimmed milk used as feed for animals other than calves - Mixed farms - Farmers using milk produced on their farm - Statement of herd size and declaration concerning the maximum number of young calves kept - Submission before the beginning of the period of aid in question ( Commission Regulation No 2793/77, Art . 4(1)(c ) and Art . 6(1)(a ) and ( b ) )