10-YEAR TARIFF WAR

2008: Commissioning of Adani's Mundra power project of 1980 MW

PPAs with Gujarat and Haryana utilities for power to be sold at ~2.35/KWh

2010: Indonesian coal norms change, leading to cost escalation

2012: Commissioning of Tata Power's 4000 MW UMPP, five years after it won bid in 2007 PPA with Gujarat, Rajasthan, Maharashtra, Punjab & Haryana to sell power at ~2.26/KWh

Adani and Tata move CERC seeking relief 2014

FEBRUARY: CERC allows 52 paise per unit compensatory tariff for Tata and 41 paise for Adani

APRIL: State-owned procurers move APTEL contesting the decision

JULY : APTEL upholds the decision, but procurers challenge it in SC

AUGUST: SC asks APTEL to expedite the matter

2016 APRIL: APTEL asks CERC to compute compensation under respective PPAs; says the regulator has no power to change tariff arrived through competitive bidding

DECEMBER: CERC allows power companies to charge the additional cost of coal 2017

APRIL: SC disallows any compensation to power units, asks CERC to compute relief as per respective PPA

2018 SEPTEMBER: High-powered committee of Gujarat government suggests cost escalation be shared by procurers, lenders and consumers

OCTOBER: SC asks CERC to work out higher tariff after taking stakeholder views