Maintenance of the injunction granted in a writ of mandamus filed by the Brazil-Canada Chamber of Commerce against the Federal Treasury, which seeks to obtain information about the arbitration proceedings conducted before its Arbitration and Mediation Center (CAM/CCBC). Rules of the Arbitration Center that prohibit "members of CAM/CCBC, arbitrators, experts, parties and other participants from disclosing any information to which they have had access by reason of their office or participation in the arbitration proceedings". Factual scenario in which the sole paragraph of Article 197 of the Brazilian Tax Code precludes the obligation to provide information: