(b) (c) (d) the expenses incurred by the Tribunal to obtain expert advice and other assistance; travel and other expenses of the Tribunal and of witnesses; and the costs for legal representation. (4) The filing fees shall be calculated in accordance with the scale of fees prescribed in the Schedule to these Rules (5) A successful party shall be allowed only such costs as the Tribunal considers reasonable and which shall have been claimed during the arbitral proceedings. (6) Except as provided in sub-rule (5) of Rule 26, the costs of arbitration shall in principle be borne by the unsuccessful party. However the Tribunal may apportion such costs between the parties if it determines that apportionment is reasonable, taking into account the circumstances of the case. (7) The expenses of the Tribunal shall be reasonable in amount. Rule 38: Security for Costs (1) The Tribunal shall have the power to order any party to provide security for the costs of any other party by way of deposit or bank guarantee or in such other manner as the Tribunal deems fit. (2) In the event that any order under sub-rule (1) is not complied with, the Tribunal may disregard a claim or counterclaim by the non-complying party, and it may proceed to determine a claim or counterclaim by a complying party. resident 19