Action to annul an arbitral award. Allegation of failure by the arbitrator to comply with the duty of disclosure. Dismissed. Purchase and sale of assets prior to the arbitration between one of the parties and a third party. The arbitrator's law firm acted only in the due diligence of that transaction on behalf of the third party, without even participating in the negotiations and drafting of the contractual instruments. Absence of objective elements that would constitute a violation of the duty of disclosure: