April 12, 2012. Indraprastha Gas Ltd (IGL) has filed a petition in the high court against the oil regulator's order that slashed pipeline tariff and compression charges, but the company has not obtained a stay order against the directive. PNGRB has cut the network tariff of IGL by 63% and reduced compression charges by 59% for CNG supplied by IGL. The company also said it would also challenge the regulator in the appellate tribunal for electricity. The regulator has also asked the company to cut retail prices to reflect the reduction in the network tariff and compression charges. It has asked the company to refund the difference to its customers for the period from April 1, 2008 till the date of issuance of order. IGL said that this was against the company's policies.