President Donald Trump signed an executive order authorizing additional US import tariffs on goods from any country that directly or indirectly buys goods or services from Iran.

The executive order was signed on Friday and frames the measure as part of an ongoing national emergency related to Iran, according to the White House. The order does not set a specific tariff rate but cites 25% as an example and states it would apply to goods imported into the US from any nation that “directly or indirectly purchases, imports, or otherwise acquires any goods or services from Iran.”