4. Each State Party may also take such measures as may be necessary to establish its jurisdiction over the offences established in accordance with this Convention when the alleged offender is present in its territory and it does not extradite him or her.
四、各缔约国还可以采取必要的措施，在被指控罪犯在其领域内而其不引渡该人时确立本国对根据本公约确立的犯罪的管辖权。