Article 20
1. Only the manager or, where there are two or more, each of the managers shall represent a grouping in respect of dealings with third parties.
Each of the managers shall bind the grouping as regards third parties when he acts on behalf of the grouping, even where his acts do not fall within the objects of the grouping, unless the grouping proves that the third party knew or could not, under the circumstances, have been unaware that the act fell outside the objects of the grouping; publication of the particulars referred to in Article 5(c) shall not of itself be proof thereof.
No limitation on the powers of the manager or managers, whether deriving from the contract for the formation of the grouping or from a decision by the members, may be relied on as against third parties even if it is published.
2. The contract for the formation of the grouping may provide that the grouping shall be validly bound only by two or more managers acting jointly. Such a clause may be relied on as against third parties in accordance with the conditions referred to in Article 9(1) only if it is published in accordance with Article 8.