Under new rules that take effect in April, all foreign nationals in the U.S. more than 30 days will need to be registered and fingerprinted.

However, on Wednesday, the Department of Homeland Security (DHS) published an interim final rule that said for Canadian nonimmigrants the fingerprint requirement was waived. “The U.S. government uses the term nonimmigrant to refer to foreign nationals who are admitted to the United States temporarily for a specific purpose,” per DHS.

Canadians staying in the U.S. for longer than 30 days — a norm for many snowbirds who spend their winters south of the border — will have to register and submit fingerprints with U.S. immigration enforcement.