There are definitely measures in both countries that are different. Some are narrowly tailored to the particular area or the particular habitat where the whale is.
In Canada, we have static measures to reduce vessel strikes that are in place from the end of April until the middle of November. They are mandatory and are monitored and enforced by Transport Canada. The speed limit in the seasonally restricted area is actually 10 knots or less in the other areas. I think the key thing is that these measures are monitored and enforced.
In the U.S., vessel strike measures can be mandatory, but the measures are not enforced the same way. They are not monitored and enforced on a near real-time basis.
With respect to fisheries, when a right whale is encountered on the east coast of Canada, approximately 670 square nautical miles are closed to fishing around that one sighting of one right whale for a minimum of 15 days. If the whales persist, that fishery is closed for the season. That's far stricter than anything that's going on in the U.S., and the U.S. doesn't have a similar dynamic system. It has some static closures, without a doubt, in high-use areas where there's fishing and whale overlap, but it doesn't have a similar dynamic system.