'The sum claimed for costs has now been increased from . . . to . . . (actually . . . ). The difference between the first two sums is less than satisfactorily explained by Mr [A] in paragraph 5 of his statutory declaration, as follows:

"The costs now claimed will differ from those costs set out in paragraph 79 (i) to (iv) "[of the Partial Award]", although the identity of the persons (with some additions) to whom these costs were paid will remain the same."

Furthermore, consideration must be given to the terms of Article 19 of the Rules, which provides as follows:

"After the Terms of Reference have been signed or approved by the Court, no party shall make new claims or counterclaims which fall outside the limits of the Terms of Reference unless it has been authorized to do so by the Arbitral Tribunal, which shall consider the nature of such new claims or counterclaims, the stage of the arbitration and other relevant circumstances."

The increase of the amount claimed for costs from . . . to . . . is arguably a "new claim" within the meaning of Article 19. However, since the increased amount continues to fall under the general head of "expenditure" (see paragraph 22, Terms of Reference), and is therefore not a "new claim" in that sense, the Tribunal authorises, and will proceed to consider, the claim.'