The Availability of a GATT Article XX Defence with Respect to a Non-GATT Claim: Changing the Rules of the Game? - Global Trade and Customs Journal View The Availability of a GATT Article XX Defence with Respect to a Non-GATT Claim: Changing the Rules of the Game? by - Global Trade and Customs Journal The Availability of a GATT Article XX Defence with Respect to a Non-GATT Claim: Changing the Rules of the Game? 5 4 Global Trade and Customs Journal