linguistic:paraphrasing
United States

The nuances and ambiguity of how international agreements are effectuated or implemented in U.S. law has been subject to multiple legal cases. The U.S. Supreme Court ruled in the Head Money Cases (1884) that "treaties" do not have a privileged position over acts of Congress and can be repealed or modified by legislative action just like any other regular law. In a similar vein, the court's decision in Reid v. Covert (1957) held that treaty provisions that conflict with the U.S. Constitution are null and void under U.S. law. However, the U.S. Supreme Court has also recognized the "supremacy" of treaties in the U.S. Constitution, such as in Ware v. Hylton (1796) and Missouri v. Holland (1920).