Two years after it was first constituted, the Petroleum and Natural Gas Regulatory Board continues to move ahead in a patchy manner -- it is inviting bids for 2,800 km of cross-country pipelines and 1,200 km of spurlines next week; it is in the process of fixing tariffs for the Mukesh Ambani-owned Reliance Gas Transportation India Limited pipeline. Its chairman L Mansingh spoke at length on several of these issues to Sunil Jain.