Lawyers for the United States and Mexico are back in the International Court of Justice over Mexico’s unusual request for an order to delay the imminent executions of five Mexican nationals on Texas’ death row because the United States remains in default of its treaty obligations.

The International Court, commonly known as the ICJ or the World Court, began two days of arguments on Thursday on Mexico’s formal request for an “interpretation” of the court’s 2004 ruling, called the Avena judgment.