GENERAL PART
Chapter XIII. Liability for offences committed abroad
Article 113. Notwithstanding regulations in force in the place of commission of the offence, the
Polish penal law shall be applied to a Polish citizen or an alien, with respect to whom no decision on
extradition has been taken, in the case of the commission abroad of an offence which the Republic of
Poland is obligated to prosecute under international agreements.
Universal jurisdiction
Nationality jurisdiction - national proceedings
EDIT.