From the Globe and Mail
The result was described yesterday by Mr. Martin as unprecedented: Both Canada and the United States have promised to "consult expeditiously" whenever they are contemplating deporting a citizen of the other country to a third nation. International law requires no such step, officials said, and the United States has signed no deal of this sort with any other country.
Doesn't International Law already allow a citizen consular access if they're arrested in a foreign country?
From what I understand with the Arar case, his rights were violated when he was prevented from contacting his consulate. This agreement seems like it would only make a difference when someone is being bullied into not contacting their country, or when their rights are otherwise violated.
Why not just stop violating their rights and allow them to contact the Canadian Consulate if they're being threatened with deportation?