(b) A party invoking the confidentiality of any information it wishes or is required to submit in the arbitration, including to an expert appointed by the Tribunal, shall make an application to have the information classified as confidential by notice to the Tribunal, with a copy to the other party. Without disclosing the substance of the information, the party shall give in the notice the reasons for which it considers the information confidential.
(c) The Tribunal shall determine whether the information is to be classified as confidential and of such a nature that the absence of special measures of protection in the proceedings would be likely to cause serious harm to the party invoking its confidentiality. If the Tribunal so determines, it shall decide under which conditions and to whom the confidential information may in part or in whole be disclosed and shall require any person to whom the confidential information is to be disclosed to sign an appropriate confidentiality undertaking.