For every investor who sees opportunity in a post-sanctions Iran, there are others who see the same old legal morass. The Islamic Republic is banking on a nuclear accord with world powers to unleash a flood of foreign cash into an economy crippled by decades of sanctions. Companies including Royal Dutch Shell Plc, BP Plc and Total SA say they’re willing to invest in the OPEC member. Major investments, however, may take years as companies weigh the risk of Iran violating the agreement, which would bring sanctions back, according to analysts and former officials. Decades of hostile relations with Western powers and tight scrutiny by the U.S. Congress and Treasury could also make many investors reluctant to jump back right away. “Businesses have become terrified about doing business with Iran, and it’s not easy to un-terrify them,” says Trita Parsi, […]