the appeal preferred by the appellant was dismissed. Being aggrieved by the Arbitral Tribunal’s award and the judgments of the High Court, the appellant has preferred the present appeal. At the outset, we may note here that one of the grounds of challenge in the present appeal was that the decision of the High Court in the case of National Highways Authority of India v. M/s. ITD Cementation India Limited1 was the subject matter of challenge before this Court. We may state that by judgment and order dated 24th April 20152, the said appeal has been partly allowed by setting aside the award made on claim no.8. SUBMISSIONS 4. The learned senior counsel appearing for the appellant pointed out that an increase in the rates of royalty on soil, sand and crushed stones which aggregates through a notification, would be adjusted as per sub-clause 70.3 (vii) of the contract, which provides for a price adjustment for all local material based on Wholesale Price Index (WPI). The learned counsel