kWh and Therms. Where:
(a) a Nomination is by reference to a quantity of Natural Gas in Therms, and the Network Code requires such nomination to be stated in kWh; or
(b) any quantity or sum determined by National Grid Gas as a number of kWh or in relation to kWh is to be employed under this Agreement for the calculation of a quantity of Natural Gas in Therms or sum of money in xxxxx per Therm; or
(c) this Agreement otherwise requires a conversion of kWh to Therms or vice versa, then such conversion shall be made on the basis of 1 Therm to 29.3071 kWh.