This has come up in a notorious case of a Mexican murderer who argued his rights were violated in his trial because he had not been notified he could contact his (Mexican) consulate.
Some Freepers want that treaty to be ignored and George Bush wants the treaty provisions recognized by the courts.
If the case is upheld by the courts, and the guy allowed to contact his consulate and then get retried, the implications are that NO MEXICAN can visit the United States and ever be under the jurisdiction of the United States per se.
That means no more Mexican anchor baby citizens.
Legislation that should have passed