Chapter 66a. Co-operation with the International Criminal Court
Art. 611h.
§ 4. If, after a court’s positive decision on admissibility of surrender of a person to the Court, the Minister of Justice postpones the execution of the request for the surrender due to the penal proceedings pending in the Republic of Poland or due to the fact that such person is serving a sentence of imprisonment for another offence, the person whom the request concerns may be temporarily surrendered to the Court subject to the terms and conditions established in consultation with the Court.
Postponement - admissibility challenge
EDIT.