Its official seat is the Ministry of Culture, Research and Higher Education of Luxembourg.

Its General Assembly meets in the successive Cultural Capitals at least once a year, while its Executive Committee is ensuring the coordination on a permanent basis.

Since the idea of European Cultural Capitals has been adopted also outside the borders of the European Union (Russia, Arab Countries, Canada, Latin America etc.), the Network adapted its rules to regroup also representatives from these new Cultural Capitals Organizations or Networks, as well as delegations from the Ministries of the new Member-States of the European Union charged with the designation of Cultural Capitals from 2009 to 2019 and also candidate cities competing for the title under the new EU-regulation ,as well as several researchers and students working on the Cultural Capitals' concept in the higher education all over the world, who are also consulting the Network's experience.

Cultural Capitals are now organised, also on the basis of a common cultural heritage as the language, in the case of the Capitals of Catalan Culture. These initiatives are also represented in ECCM.

The ECCM-Network is a continuous know-how transfer by the organizers of Cultural Capitals to the new designated or candidate cities. It is also a hub of new ideas [and a continuous brain-storming] on how to improve the institution and the intercultural dialogue as a policy tool for peace and equitable international cooperation.