7Where a court is seised of a claim which is principally concerned with a matter over whichanother court has exclusive jurisdiction by virtue ofRule 4, or where it is precluded from exercising jurisdiction by Rule 4(3), it shall declare of its own motion that it has no jurisdiction.[Article 19]
8Wherein any case a court has no jurisdiction which is compatible with this Act, and the defender does not enter an appearance, the court shall declare of its own motion that it has no jurisdiction.[Article 20]