The CCNR is attentive to close cooperation with the other river commissions.
There is a tradition of exchanges with the Danube Commission. The two organisations invite each other to attend their plenary meetings and their working sessions. On 22 June 2001, the two Commissions held a joint meeting, at which a joint declaration was adopted.
A Cooperation Agreement was reached in 2008 with the Moselle Commission.
An reinforcement cooperation was agreed upon in 2001 with the International Commission for the Protection of the Rhine.
There is also regular contact with the Sava Commission.