Article I-13 Areas of exclusive competence
1. The Union shall have exclusive competence in the following areas:
(a) customs union;
(b) the establishing of the competition rules necessary for the functioning of the internal market;
(c) monetary policy for the Member States whose currency is the euro;
(d) the conservation of marine biological resources under the common fisheries policy;
(e) common commercial policy.
2. The Union shall also have exclusive competence for the conclusion of an international agreement when its conclusion is provided for in a legislative act of the Union or is necessary to enable the Union to exercise its internal competence, or insofar as its conclusion may affect common rules or alter their scope.
