I am wondering if a TN is required for the following sub consultant: The job has a specific time frame, e.g. 18 months, and wishes to engage a sub consultant who is based in Canada (and is Canadian). It would not require the Canadian worker to live in the US, but rather simply to attend meetings once or twice a month for a day at a time. The worker would then use the data collected at those meetings to provide documentation or analysis,working from Canada. This is on a sub-consultant basis. Payment comes from the main consultant, a US company. For what it is worth, income would be claimed in Canada under the tax treaty, with a US income tax form also filed each year by the sub consultant. All other aspects of the TN process would be met, e.g. Job description, professional qualifications, etc. Thanks.