Originally Posted by
JeffersonCampervan
I'm a Canadian Nexus holder.
I'll be flying back from AMS to YYZ via IAD.
I'd like to bring back my Canadian exempt amount.
But since I'm transferring at IAD for 2 hours, what rules apply?
(In this direction, I'm required to retrieve my checked bag in IAD, pass through US Customs and re-check onward to YYZ).
Because there's no such thing as "international transit" in the United States, you'll be held to US alcohol limits. Though as mnbp mentions, it's rare to be assessed a duty for reasonable amounts, in part because it's a huge hassle for Customs agents.