This is all preliminary, mostly because I made the mistake of taking German instead of Spanish in high school, but if Google Translator is correct, it appears the Mexican Supreme Court  has ruled that secret ballots are necessary in union elections.

As you might recall, Rep. George Miller and a number of other Democrats in Congress wrote the Mexican government urging them to use secret ballots in union organizing campaigns to prevent intimidation. Of course, now those same Representatives seek to take away the secret ballot from American workers, by passing the deceptively-named Employee Free Choice Act.

Update: People with a better Spanish vocabulary than mine have confirmed that the court did indeed rule that secret ballots are necessary to prevent intimidation and harassment during union organizing campaigns.