Commission Regulation (EC) No 2101/98 of 30 September 1998 amending Regulation (EC) No 1352/98 amending Regulation (EC) No 1222/94 laying down common detailed rules for the application of the system of granting export refunds on certain agricultural products exported in the form of goods not covered by Annex II to the Treaty, and the criteria for fixing the amount of such refunds