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.
In 2014, this cooperation was enhanced by a new arrangement.
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.