An American producer can work with a Canadian model under the following circumstances:

1. The producer travels to Canada (or anywhere outside the US) to shoot the content.

2. The model has a US government-issued ID (non-driver ID, drivers license)

3. The model has dual citizenship (though you would probably still want a US-issued ID

4. The model has a US work visa (green card), NOT a tourist or student visa.

Otherwise, in the brilliant logic that only the Justice Dept. can come up with, an identification document such as a Canadian passport or provincial insurance card which is valid if presented to the producer in Canada is suddenly, magically, not valid or reliable if presented to the producer in the US.