Toro Toro:
I read an article today that said not only does the US not recognize the Northwest Passage as sovereign Canadian waters, but neither does the EU.
What, exactly, is Canada's basis for claiming the passage under International Law?
Under International Law, which Canada recognized upon ratifying the Treaty of the Seas, it is Canadian territory but it is also open to unfettered transit by international shipping. The two places in the world with similar political situations are the Straits of Malacca (sp?) between Indonesia and Malaysia and the Bosporous in Turkey.
Ironically, the USA invokes the Treaty because Canada ratified it, but the USA itself refuses to ratify it.
IMHO that gives Canada a right to limit access to signatories of the Treaty.
Even then, the EU is a signatory and under the Treaty has legitimate rights to transit the passage without any further permission.