If any contracting party considers that a product is not receiving from another contracting party the treatment which the first contracting party believes to have been contemplated by a concession provided for in the appropriate Schedule annexed to this agreement,it shall bring the matter directly to the attention of other contracting party.If the latter agrees that the treatment contemplated was that claimed by the first contracting party,but declares that such treatment cannot be accorded because a coun or other proper authority has ruled to the effect that the product involved cannot be classified under the tariff laws of such contracting party so as to permit the treatment contemplated in this Agreement,the two contracting parties,together with any other contracting parties substantially interested,shall enter promptly into further negotiation with a view to compensatory adjustment of the matter.