Changes made by Commission Regulation (EEC) No 2681/81 of 16 September 1981 amending Regulation (EEC) No 1054/78 in respect of application of the exchange rates in the wine sector: Commission Regulation (EEC) No 373/78 of 23 February 1978 laying down certain detailed rules for the conduct of distillation operations in the wine sector and defining the event giving rise to payment of the amounts involved in these operations