02/18/1988
https://www.presidency.ucsb.edu...
"I have decided that expeditious action is required, and to increase temporarily the rates of duty on imports from Canada of the softwood lumber products."
"I am authorizing the Secretary of Commerce to determine when the Government of Canada begins to collect the export charge."
"This increase shall go into effect on December 31, 1986, and will terminate when the Government of Canada begins to collect the export charge on exports of certain softwood lumber products."
"Subpart B of part 1 of Schedule 2 of the Tariff Schedules of the United States is modified, with respect to products of Canada imported into the United States by adding an additional duty of 15 percen..."