CHAPTER II: COOPERATION WITH THE COURT
SECTION IV: FURTHER PROVISIONS
Art. 13 Transit
1 Upon request of the Court, the Central Authority may authorize the transit of a person in detention and the measures necessary for transit, without hearing the views of the affected person.
2 No authorization is required if the person in detention is to be transported by air over Swiss territory and no landing is scheduled.
3 If an unscheduled landing occurs, the person in transit shall be kept in custody. The Central Authority shall immediately ask the Court to make a request for transit. If the request is not received within 96 hours, the person shall be released. If the request is received after this period of time has elapsed, the person may again be arrested and the transit of the person may be authorized.
Unscheduled landing on territory of transit State
EDIT.