There are a couple of separate issues here. One is the Coasting Trade Act as it pertains to importing foreign seismic vessels. In that particular issue, Canada is a little anomalous with Nigeria in its process for importing foreign-flagged ships.
The second issue is environmental protection. The Canada-Newfoundland and Labrador Offshore Petroleum Board has some of the most stringent regulations globally in terms of how seismic is monitored, marine mammals, and there are numerous studies ongoing in terms of its effect on fish species, etc., and shrimp.