109. A watercourse linking or separating the territory of two or more regional county municipalities is under the joint jurisdiction of those regional county municipalities. Joint jurisdiction is exercised under an agreement or through the board of delegates, as the regional county municipalities concerned choose. Failing an agreement on the exercise of the joint jurisdiction within 60 days of the sending of a notice for that purpose by one regional county municipality to the other regional county municipalities concerned, jurisdiction is exercised through the board of delegates.
The board of delegates possesses and exercises all the powers of a regional county municipality regarding that watercourse.