... the importing signatory may baseits procedures and measures either(a) on this Agreement, or, alternatively(b) on the Agreement on Implementation of Article VI of the General Agreement on Tariffs ... thisparagraph.SUBSIDIES AND COUNTERVAILING DUTIES 51 AGREEMENT ON INTERPRETATION AND APPLICATION OF ARTICLES VI, XVI AND XXIII OF THE GENERAL AGREEMENT ON TARIFFS AND TRADE The signatories1 to this Agreement, Noting ... alia, the volume and prices of non-subsidized imports of the product in question, contraction in demand or changes in the pattern of consumption, trade restrictive practices of and competition between...