Artikel 13

1. A person in custody in the Requested Party whose appearance is requested in the Requesting Party for the purpose of giving testimony or providing other assistance shall, if the Requested Party consents, be transferred to the Requesting Party for that purpose, provided that the Requesting Party has guaranteed maintaining the person in custody and his or her subsequent return as soon as the person's presence is no longer required, but no later than the time specified by the Requested Party.
2. Transfer may be refused if:
a) the person concerned does not consent to appear;
b) his or her presence is required for an investigation or proceeding pending in the Requested Party; or
c) there are other overriding grounds against transfer.
3. Where a person in custody who is transferred, becomes entitled under the law of the Requested Party to be released from custody whilst he or she is in the Requesting Party, the Requested Party shall inform the Requesting Party which shall ensure the person's release and thereafter treat the person as a person referred to in Article 12.
4. A person who does not consent to be transferred shall not by reason thereof be liable to any penalty or coercive measure pursuant to the law of either Party.