Commission Regulation (EEC) No. 1537/90 imposing a provisional antidumping duty on imports of potassium permanganate originating in the USSR 28 May 1990 - World Trade and Arbitration Materials View Commission Regulation (EEC) No. 1537/90 imposing a provisional antidumping duty on imports of potassium permanganate originating in the USSR 28 May 1990 by - World Trade and Arbitration Materials Commission Regulation (EEC) No. 1537/90 imposing a provisional antidumping duty on imports of potassium permanganate originating in the USSR 28 May 1990 2 4 World Trade and Arbitration Materials