4. Each State Party may also adopt such measures as may be necessary to establish its jurisdiction over the offences covered by this Convention when the alleged offender is present in its territory and it does not extradite him or her.
4．各缔约国还可采取必要措施，在被指控人在其领域内而其不引渡该人时确立其对本公约所涵盖的犯罪的管辖权。