Government officials don’t know if Canadians who invest in legal cannabis producers will be banned from entering the United States.

Just days before cannabis becomes legal on Oct. 17, senior Canadian government officials said they’re still waiting for clarification from American officials as to whether stockholders will be banned for life from crossing the border.

“These are questions and decisions that are going to be made by the U.S customs officers,” officials said. “We don’t have any more clarity than that.”

Reports first surfaced last month that investors and cannabis-industry workers could be turned away from the American border after legalization starts in Canada. Cannabis is legal in a handful of U.S. states, but is still illegal under their federal laws.

“Travellers have a responsibility to learn about the laws of the country they intend to visit,” a senior official said.

For that reason, officials said the government will not intervene on behalf of a Canadian traveller who does not comply with the rules of entry.

The remarks by U.S. officials made headlines on both sides of the border, but a travel ban has existed for years. Toronto lawyer Annamaria Enenajor told the CBC that pot users, industry workers and investors are “inadmissible aliens” under American law and could therefore be turned away from the border or banned for life.

Government officials say all people crossing the border will have to declare any cannabis products. Canada Border Services Agency has added a new question asking travellers if they are bringing any cannabis into Canada from the United States.

Officials said “additional resources” will be deployed to cover any delays an additional question could cause at the border.

Declarations will be determined on a case-by-case basis, officials continued. Cannabis seized at the border could be “destroyed” if border officers decide there is no criminal intent.

Leaflets telling Canadians not to travel with cannabis will be given out with new passports in the upcoming year. These leaflets, along with signs at the airport and an aggressive social media campaign, are part of a larger public awareness campaign warning about the possible repercussions of travelling with cannabis.