The U.S. Department of the Treasury – through its Office of Foreign Assets Control (OFAC) designates a web of front companies, vessels, and shipping-services firms linked to Sepehr Energy Jahan, the oil-sale arm of Iran’s military, as sanctions targets under authorities that target Iran’s petroleum and petrochemical sectors. The action also expands sanctions to six additional vessels and includes entities involved in chartering and transporting Iranian crude — a move intended to disrupt Iran’s shadow-fleet export operations…