The government of Mexico, in a direct challenge to the Bush administration, asked the International Court of Justice today to block the executions of 51 Mexicans on death row in the United States. The court, the highest tribunal of the United Nations, sits in The Hague. It has no enforcement powers. But if it issues an injunction, the United States must choose whether to respect or defy its judgment.

Mexico filed suit against the US in the International Court of Justice in the Hague over the U.S.’s failure to comply with the Vienna Convention’s guarantee of allowing foreign nationals access to consular officials prior to interrogation. Mexico is also seeking provisional measures, essentially a temporary restraining order, against all capital prosecutions in the US against Mexican nationals until the case is resolved.

Here is the text of the Vienna Convention on Consular Relations and Optional Protocols.