This Decision sets out the responsibilities to be exercised by the Council and the HR to avert a threat to the security of the Union or one or more Member States or to mitigate serious harm to the essential interests of the Union or of one or more Member States arising from the deployment, operation or use of the European Global Navigation Satellite System, in particular as a result of an international situation requiring action by the Union or in the event of a threat to the operation of the system itself or its services.