What is the name of the law that prevents anyone outside of the Federal government from making foreign policy?

There is some law in the US passed in the 1800s I beleive that forbids anyone outside of the federal government from deciding foreign policy.





This means state goveners, generals, etc. cannot speak to foreign leaders without permission from the government.





What is the name of this law?

What is the name of the law that prevents anyone outside of the Federal government from making foreign policy?
The Logan Act is a United States federal law that forbids unauthorized citizens from negotiating with foreign governments. It was passed in 1799 and last amended in 1994. Violation of the Logan Act is a felony, punishable under federal law with imprisonment of up to three years.





The text of the Act is broad and is addressed at any attempt of a US citizen to conduct foreign relations without authority. However, there is no record of any prosecutions nor convictions under the Logan Act.
Reply:Article II of the U.S. Constitution gives the President the sole power to make foreign policy. Congress must ratify any treaties, but other than that, no one else has any say about what policies the U.S. will pursue. The President can enter into so-called "Executive Agreements" with other countries without Congressional approval. A state official can speak to foreign leaders, but can't bind the U.S. to a particular policy.