https://www.taxtmi.com/caselaws?id=176011 A statutory authority cannot unilaterally raise an agreed electricity tariff by levying a coal surcharge unless the governing Act and schedule clearly confer that power. The challenge to the surcharge was therefore maintainable in writ proceedings because the arbitration clause covered only disputes arising under the supply agreement, not a challenge to the existence of statutory authority itself. The statutory provisions relied upon did not authorise overriding the contracted rate or imposing an additional charge that effectively enhanced the tariff. The action was unsustainable on the statutory scheme examined. en-us Wed, 23 Jul 1975 00:00:00 +0530 Thu, 10 Dec 2015 12:45:19 +0530 TaxTMI RSS Generator https://www.taxtmi.com/caselaws?id=176011 A statutory authority cannot unilaterally raise an agreed electricity tariff by levying a coal surcharge unless the governing Act and schedule clearly confer that power. The challenge to the surcharge was therefore maintainable in writ proceedings because the arbitration clause covered only disputes arising under the supply agreement, not a challenge to the existence of statutory authority itself. The statutory provisions relied upon did not authorise overriding the contracted rate or imposing an additional charge that effectively enhanced the tariff. The action was unsustainable on the statutory scheme examined. Case-Laws Indian Laws Wed, 23 Jul 1975 00:00:00 +0530 https://www.taxtmi.com/caselaws?id=176011