The President's News Conference
06/27/1983
https://www.presidency.ucsb.edu...
I believe that the preferable solution is to open foreign markets, not to close our own.
I intend to take or to authorize all appropriate action in response to any future failure by the Government of Canada to meet the objectives...
This increase shall go into effect on December 31, 1986, and will terminate when the Government of Canada begins to collect the export charg...
I am authorizing the Secretary of Commerce to determine when the Government of Canada begins to collect the export charge.