311 Actions

Section 311 of the USA PATRIOT Act provides the Secretary with a range of options that can be adapted to target specific money laundering and terrorist financing risks most effectively. These options provide the Treasury Department with a powerful and flexible regulatory tool to take actions to protect the U.S. financial system from specific threats.

if you search Qresear.ch for 'Latvia' you'll see how it was last used. I'll try to dig up the old info as well and post

https://home.treasury.gov/policy-issues/terrorism-and-illicit-finance/311-actions