Artikel 21

1. Amendments to this Protocol may be proposed by any Party to this Protocol and shall be communicated by the Secretary General of the Council of Europe, to the member States of the Council of Europe and to the Parties and signatories to the Convention as well as to any State which has been invited to accede to the Convention.
2. Any amendment proposed by a Party shall be communicated to the European Committee on Crime Problems (CDPC), which shall submit to the Committee of Ministers its opinion on that proposed amendment.
3. The Committee of Ministers shall consider the proposed amendment and the opinion submitted by the CDPC and, following consultation with the Parties to the Convention, may adopt the amendment.
4. The text of any amendment adopted by the Committee of Ministers in accordance with paragraph 3 shall be forwarded to the Parties to this Protocol for acceptance.
5. Any amendment adopted in accordance with paragraph 3 shall come into force on the thirtieth day after all Parties to this Protocol have informed the Secretary General of their acceptance thereof.