Translate the following English sentence to French:
"Other windows onto the subject, opened by certain Member States such as Germany and Austria, were immediately closed again, since any alternative proposal was declared out of hand to be incompatible with the constraints to which we have subjected ourselves under the GATT agreement."
Les perspectives ouvertes par certains États membres, comme l'Allemagne ou l'Autriche, ont été aussitôt refermées, toute proposition alternative étant déclarée a priori incompatible avec les contraintes dans lesquelles nous nous sommes enserrés au GATT.