The arbitral tribunal shall state the costs of arbitration in its arbitral award. The costs comprise of:

1. the fees of the arbitrators;

2. the arbitrators’ travel and other expenses;

3. the fees paid to the experts, and to the other persons whose assistance is sought and who are, collectively, appointed by the arbitral tribunal, and the costs for the site inspection;

4. the witnesses’ travel and other expenses to the extent approved by the arbitral tribunal;

5. if he/she is represented by a lawyer, the successful party’s attorney fees;

6. the charges to be made for the applications, when necessary, to the courts;

7. the notification expenses with respect to the arbitral proceedings

Therefore, the correct option is C.