falls in a separate category. In other words, the contention that stands accepted was, that the escalation in price premised on fluctuation in market value of the inputs stands on one footing, while the additional cost resulting from the impact of any statute, decree, ordinance, law etc as referred to in sub-clause 70.8 stands on the other. Resultantly the governing clauses in the instant case were held not to be sub-clauses 70.1 to 70.7 but the substantive part of sub-clause 70.8. The award also considered whether minor minerals in question were or were not included in the basket of materials whose cost variation was taken into account as an input while arriving at WPI. It also considered that the WPI is an index applicable uniformly in all states while the increase 2 Page 30 in Seigniorage Fee would vary from state to state. It further dealt with the aspect that NHAI itself was of the opinion that the additional impact as a result of subsequent legislation was admissible separately,