Artikel 23

1. With a view to facilitating co-operation between the States Parties, their competent authorities shall:
a) provide the Secretary General of the Council of Europe with information about their internal law relating to nationality, including instances of statelessness and multiple nationality, and about developments concerning the application of the Convention;
b) provide each other upon request with information about their internal law relating to nationality and about developments concerning the application of the Convention.
2. States Parties shall co-operate amongst themselves and with other member States of the Council of Europe within the framework of the appropriate intergovernmental body of the Council of Europe in order to deal with all relevant problems and to promote the progressive development of legal principles and practice concerning nationality and related matters.