The obvious reasons for the exercise of territorial jurisdiction, particularly relating to criminal law, are that:

• The state where the crime is committed generally has the strongest interest in punishing the criminal.
• The local forum is the most convenient one, since the witnesses and other facilities are most probably available there.
• The offender is most likely to be found there.
• To avoid the element of double jeopardy, i.e., subjecting the person to two legal systems at the same time.