** Shares of Indraprastha Gas IGAS.NS rise about 3% to 226 rupees apiece
** Rise after PNGRB, India's petroleum and natural gas regulator, approves reforms in natural gas pipeline tariff regulations
** The new PNGRB draft regulations are seen as positive for Indraprastha Gas Ltd primarily because they improve the company's margin outlook, say two analysts
** IGAS shares are up 5.6% in 2025 so far, outpacing the 3.4% rise in energy index .NIFTYENR. exchange data shows
(Reporting by Bharath Rajeswaran in Bengaluru)
((bharath.rajeswaran@thomsonreuters.com; +91 9769003463;))