3. The provisions of this article shall apply to a coun­ter­claim accordin­gly.

Article 25 - Counterclaim

1. A counterclaim that is not raised, at the latest, in the statement of defence or, in the absence thereof, that is not brought forward in the first written or oral defence, cannot be raised at a later stage in the same arbitral proceedings, except in exceptional circumstances as determi­ned by the arbitral tribunal.

2. A counterclaim is admissible if it falls under the same arbitration agreement as that on which the request for arbi­tration is based, or if the same arbitration agree­ment is expressly or tacitly made to apply to it by the parties.

Article 26 - Hearing