1. This Convention shall, in respect of those countries to which it applies, supersede the provisions of any bilateral treaties, conventions or agreements governing extradition between any two Contracting Parties.
2. The Contracting Parties may conclude between themselves bilateral or multilateral agreements only in order to supplement the provisions of this Convention or to facilitate the application of the principles contained therein.
3. Where, as between two or more Contracting Parties, extradition takes place on the basis of a uniform law, the Parties shall be free to regulate their mutual relations in respect of extradition exclusively in accordance with such a system notwithstanding the provisions of this Convention. The same principle shall apply as between two or more Contracting Parties each of which has in force a law providing for the execution in its territory of warrants of arrest issued in the territory of the other Party or Parties. Contracting Parties which exclude or may in the future exclude the application of this Convention as between themselves in accordance with this paragraph shall notify the Secretary-General of the Council of Europe accordingly. The Secretary-General shall inform the other Contracting Parties of any notification received in accordance with this paragraph.