"If... a Canadian is coming to the United States and it has nothing to do with the marijuana industry or the proliferation of the industry, that person would generally be deemed admissible", CBP officer Christopher Perry said in a press conference near the Canadian border, as cited by Al Jazeera.
Possession of cannabis first became a crime in Canada in 1923.
"There will be a lot of celebrations on the day, and it will nearly all be with illegal cannabis" in some of Canada's biggest cities, said Brad Poulos, an instructor and cannabis business expert at Ryerson University in Toronto.
Cannabis will now be sold in stores and ordered online, with the drugs posted to customers' homes. Provided you pay the fine promptly, you would not have a criminal record; the Canadian government compared being ticketed for carrying 50 grams or less to a traffic infraction.
-Adults can cultivate up to four plants in their households and make products (edibles) for personal use.
What About Previous Pot Charges? If it's more than that amount, an individual could be charged under Bill C-45's distribution laws and face up to 14 years in prison.
CBP said in a statement that officers are "thoroughly trained on admissibility factors" when assessing people who come to the USA from Canada.
The offense is punishable by up to 14 years in prison. It's now legal for them to light up.
Who's betting on Canadian marijuana? Online sales will be allowed throughout the country, and the selling price per gram should be between $6 and $10 Canadian dollars.
People line up outside a cannabis store to purchase products for the first time, October 17, 2018 in Montreal.
Despres smoked bought pot with a low level of THC, the psychoactive agent in cannabis. Illicit cannabis means it was sold, produced or distributed by someone who was not allowed to do so.
Each province sets its own age limits, rules and regulations regarding the sale of cannabis with some opting for brick and mortar stores while others prefer to keep the business online.
"The response to cannabis legalization has resulted in a high volume of orders".
US Customs and Border Protection have reiterated that marijuana remains illegal under US federal law and those caught at the border with pot would be subject to arrest and prosecution.
The marijuana drug has been legalized for medical purposes in Canada in 2001.
That goes for the other direction too. In December 2013, Uruguay was the first country to legalize the production, sale and consumption of marijuana.
Canadians who want to share some of their cannabis by mailing it to a friend may want to reconsider. Illegal dispensaries in Vancouver and Victoria also kept their doors open on Wednesday.