Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. - Common Market Law Review View Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. by Maurice V. Polak - Common Market Law Review Case C-214/89, Powell Duffryn PLC v. Wolfgang Petereit, Judgment of 10 March 1992. Maurice V. Polak 30 2 Common Market Law Review