Code of Organization and Civil Procedure (Cap. 12), article 827

827. (1) The provisions of the las t preceding article shall not have effect: (a) if the judgment sought to be enforced may be set aside on any of the grounds ment ioned in article 811; (b) in the case of a judgment by default, if the parties were not contumacious accord ing to foreign law; (c) if the judgment contains any disposition contrary to public policy or to the inte rnal public law of Malta. (2) For the purposes of this article, the plea to the jurisdicti on of the court by which the judgme nt was delivered, may be raised in terms of article 811( d), even though that court may have adjudged upon a plea to its jurisdiction, in the case of any action brou ght against any person not subject to the jurisdiction of that cour t by reason of domicile or residence , unless such person had volunta rily submitted to the jurisdiction thereof. Effects of registration of judgment in Public Registry.