Artikel 6

1. This Protocol shall be open to signature by the member States of the Council of Europe, signatory to the Convention, who may become Parties to it either by:
a. signature without reservation in respect of ratification, acceptance or approval;
b. signature with reservation in respect of ratification, acceptance or approval, followed by ratification, acceptance or approval.
2. Instruments of ratification, acceptance or approval shall be deposited with the Secretary General of the Council of Europe.
3. A member State of the Council of Europe may not sign this Protocol without reservation in respect of ratification, acceptance or approval, nor ratify, accept or approve it, unless it has, simultaneously or previously, ratified or accepted the Convention.