Clause 13 of the agreement reads: "If at any time the consumer is prevented from receiving or using the electrical energy to be supplied under this agreement either in whole, or in part due to strikes, riots, fire, floods, explosions, act of God or any other case reasonably beyond control or if the Board is prevented from supplying or unable to supply such electrical energy owing to any or all of the causes mentioned above then the demand charge and guaranteed energy charge set out in the schedule shall be reduced in pro portion to the ability of the consumer to take or the Board to supply such power and the decision of the Chief Engineer, Bihar State Electricity Board, in this respect shall be final." In view of this language of the clause clearly providing for the proportionate reduction of the annual minimum guarantee bills it could not be doubted that the High Court was not right in coming to the conclusion that the respondents were not liable to pay annual minimum 175 guarantee bills at all.