Artikel 18

1. Each Party undertakes to ensure that, at the request of another Party, controlled deliveries may be permitted on its territory in the framework of criminal investigations into extraditable offences.
2. The decision to carry out controlled deliveries shall be taken in each individual case by the competent authorities of the requested Party, with due regard to the national law of that Party.
3. Controlled deliveries shall take place in accordance with the procedures of the requested Party. Competence to act, direct and control operations shall lie with the competent authorities of that Party.
4. Parties shall at the time of signature or when depositing their instrument of ratification, acceptance, approval or accession, by means of a declaration addressed to the Secretary General of the Council of Europe, indicate the authorities that are competent for the purposes of this article. They subsequently may, at any time and in the same manner, change the terms of their declaration.