Tariff Details Tariff w.e.f. April 1, 2018 Tariff w.e.f. September 1, 2017 to March 31, 2018 Tariff w.e.f October 1, 2015 to August 31, 2017 Tariff w.e.f. July 17, 2014 to September 30, 2015 Tariff w.e.f. August 1, 2013 to July 16, 2014 Tariff w.e.f. July 1, 2012 to July 31, 2013 Tariff w.e.f. September 1, 2011 to June 30, 2012