Article L5621-6 of the French General Code of Local Authorities
Any modification to the decision establishing the inter-regional agreement is pronounced by decree in the Conseil d’Etat on a proposal from the council of the agreement and after concordant deliberations by the regional councils of the member regions. A member region may withdraw following a unanimous decision by the council of the agreement. The agreement may be dissolved, at the request of the regional council of a member region, under…