FlyerTalk Forums - View Single Post - 1989 7 million US passports: Now 103 million
Old Sep 20, 2011 | 7:59 pm
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gobluetwo
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Originally Posted by MJLouise
What year did the Mexico / Canada PP rules take effect?
Based on this graphic, I'd say sometime around 2007:


And in fact, this USA Today article from 2005 confirms that the change went into effect for air/sea travel by Dec 31, 2006, and for land travel by Dec 31, 2007.
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