While the oil industry and market are still assessing the impact of the U.S. withdrawal from the Iran nuclear deal and the re-imposition of sanctions, the biggest hurdle to Iran’s crude oil exports could be issues with the insurance of tankers carrying oil out of Iran—and this could significantly affect its exports. After the 180-day wind-down period, reinstated U.S. sanctions on Iran will likely prevent the members of the International Group of P&I from insuring the tankers against risks if they call on Iranian ports to export…