There is no contestable administrative decision over which this Tribunal has jurisdiction, rather the Applicant is seeking to have the Tribunal substitute its view for that of the Arbitration Committee with regard to an internal UNSU matter. The application is not receivable rationae materiae. As indicated in Kisambira Order No. 36 (NY/2011), the Dispute Tribunal has no jurisdiction over matters involving the internal affairs of a staff association. The application is not receivable.