Commission Regulation (EC) No 2621/1999 of 10 December 1999 establishing the forecast supply balance and Community aid for the supply to French Guiana of products falling within CN codes 2309 90 31, 2309 90 33, 2309 90 41, 2309 90 43, 2309 90 51 and 2309 90 53 used in feedingstuffs for 2000