I. General Provisions
Article 5
Challenge of admissibility of proceedings before the International Criminal Court; deferral of proceedings to the International Criminal Court or an International Tribunal
(b) criminal proceedings are underway before the Liechtenstein public prosecutor or a Liechtenstein court either on account of an act committed in Liechtenstein or by a Liechtenstein national or of a request from the International Criminal Court for arrest and surrender or for the provision of judicial assistance, except where priority should be given to the pursuit of criminal proceedings by the International Criminal Court in consideration of particular circumstances, especially in order to establish the truth or the relation to other crimes giving rise to proceedings before the Court; or
(c) proceedings were already underway before the public prosecutor or a court in Liechtenstein on account of the act and were suspended on other than strictly procedural grounds.
Admissibility challenge - State investigation or prosecution
EDIT.