Artikel 20

1. Each Contracting Party to this Convention shall, at the time of signature or when depositing its instrument of ratification, acceptance, approval or accession, by means of a declaration addressed to the Secretary General of the Council of Europe, indicate the professional titles falling under the scope of this Convention for the purposes of Article 3, sub-paragraph a. This declaration may be modified at any later date and in the same manner. This declaration and any modification thereof shall not undermine the purpose of this Convention and the protection provided by it.
2. Each Contracting Party to this Convention may at the time of signature or when depositing its instrument of ratification, acceptance, approval or accession, by means of a declaration addressed to the Secretary General of the Council of Europe, declare that the definition of “public authorities” includes one or more of the following bodies:
(i) legislative bodies as regards their other activities;
(ii) judicial authorities as regards their other activities;
(iii) natural or legal persons insofar as they perform public functions or operate with public funds, according to domestic law.
This declaration may be modified at any later date and in the same manner.