It is a common understanding that merger notification principles must have a jurisdictional nexus to the types of merger control criteria that exist in a particular country. This means that the type of notification criteria must, of course, fully cover all necessary information for the assessment of the notified concentration but this means, at the same time, that they should not require notification of data or facts which are not relevant for the assessment by the competition authority. Exactly this last point often creates problems, since competition authorities argue the need for supplementary information in a notification with the interest to know all aspects of the concentration development in their country, even without regard to a particular case.