Confidentiality of mediator communications: written-only exceptions allowed, limited to attendance, consent, suitability, or settlement. Mediator or conciliator communications with the Central Government, the Tribunal, or the Appellate Tribunal are generally prohibited to protect party confidence and mediator neutrality; necessary communications must be in writing with copies provided to parties. Permitted communications are limited to reporting non-attendance, parties' consent, an assessment that the case is unsuitable for settlement, or notification of settlement between the parties.