Commission Regulation (EC) No 783/2001 of 23 April 2001 amending Regulation (EC) No 2705/2000 derogating from Regulation (EC) No 2799/1999 laying down detailed rules for applying Council Regulation (EC) No 1255/1999 as regards the grant of aid for skimmed milk and skimmed-milk powder intended for animal feed and the sale of such skimmed-milk powder and repealing Regulation (EC) No 1492/2000