Edinburgh-based Cairn Plc, which slapped a restitution notice on the Indian government under Bilateral Investment Promotion and Protection Agreement (BIPA) in March 2015, is crying foul because its frozen assets here have been sold by the Delhi income tax department over a period of time. This is the fallout of a long-drawn case involving retrospective taxation of capital gains on transactions between foreign entities involving assets based in India. The company no longer has assets or investments in India. Once a feted poster boy for investing in India’s sedimentary basins for oil and gas that could save imports, its paltry