Artikel 4

1. The consent of the person sought and, if appropriate, his or her express renunciation of entitlement to the rule of speciality shall be given before the competent judicial authority of the requested Party in accordance with the law of that Party.
2. Each Party shall adopt the measures necessary to ensure that consent and, where appropriate, renunciation, as referred to in paragraph 1, are established in such a way as to show that the person concerned has expressed them voluntarily and in full awareness of the legal consequences. To that end, the person sought shall have the right to legal counsel. If necessary, the requested Party shall ensure that the person sought has the assistance of an interpreter.
3. Consent and, where appropriate, renunciation, as referred to in paragraph 1, shall be recorded in accordance with the law of the requested Party.
4. Subject to paragraph 5, consent and, where appropriate, renunciation, as referred to in paragraph 1, shall not be revoked.
5. Any State may, at the time of signature or when depositing its instrument of ratification, acceptance, approval or accession, or at any later time, declare that consent and, where appropriate, renunciation of entitlement to the rule of speciality, may be revoked. The consent may be revoked until the requested Party takes its final decision on extradition under the simplified procedure. In this case, the period between the notification of consent and that of its revocation shall not be taken into consideration in establishing the periods provided for in Article 16, paragraph 4, of the Convention. Renunciation of entitlement to the rule of speciality may be revoked until the surrender of the person concerned. Any revocation of the consent to extradition or the renunciation of entitlement to the rule of speciality shall be recorded in accordance with the law of the requested Party and notified to the requesting Party immediately.