As well, marijuana residue, which can linger for weeks inside a vehicle, could be detected by inspection dogs and lead to further questioning.
As cannabis in the US continues to be normalized by the growing amount of domestic legal industries, it seems as though moves like these will continue to be in opposition to what the majority of the USA wants, and clearly what Canada would like to see. Still, he said you mustn't lie about it, since that would be "fraud and misrepresentation, which carries a lifetime ban".
"Our officers are not going to be asking whether they have used marijuana, but if other questions lead there-or there is the smell coming from the auto, they might ask", Owen told the online magazine Politico.
The U.S. government views foreigners working in the marijuana industry the same way they would someone working for an illegal drug cartel or as a dealer, regardless of their home nation's laws.
Typically, travellers will be given the opportunity to "voluntary withdraw" from the border, or they face an "expedited removal".
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No matter the traveller's choice, it all goes on the record and that traveller will not be allowed to return to the U.S unless he applies for a waiver to strike the lifetime ban.
A lifetime ban on entering the US will apply to travellers who admit to using marijuana, employees in the marijuana industry, and investors in the marijuana sector, according to the official.
Anyone who travels to the United States regularly knows that a common question at the border is "what do you do for a living?" "If you work for the industry, that is grounds for inadmissibility".
"We don't recognize that as a legal business", Mr. Owen added.
Prime Minister Justin Trudeau downplayed the matter on Tuesday, though he has said publicly he has smoked pot. It has been legalized in nine USA states and Washington, D.C., but remains illegal at a federal level.
"Every country has the right to judge who gets to come into their borders or not", he said.
"A lot of people don't understand that they are still going to have problems after legalization", said Henry Chang, a partner at Blaney McMurtry LLP in Toronto who handles immigration law on both sides of the border.