US officially ratifies Iran's Revolutionary guard as terrorist forces

The US terrorism label for Iran's Revolutionary Guard has taken effect amid a battle between the Trump administration and some in Congress over waivers on other sanctions. The Guard's formal designation as a "foreign terrorist organisation" kicked in Monday with a notice published in the Federal Register.

The unprecedented designation for a foreign government agency adds a layer of sanctions to the elite military unit and makes it a crime for anyone in US jurisdictions to provide it with "material support". President Donald Trump and Secretary of State Mike Pompeo had announced the move last week, opening a one-week consultation period with Congress. Lawmakers were broadly supportive of it but congressional Iran hawks are now expressing concern that the administration may extend waivers on oil and nuclear sanctions.