10/16/1960
https://www.presidency.ucsb.edu...
"Now, Therefore, I, John F. Kennedy, President of the United States of America, acting under the authority of the Constitution and statutes, including Section 102 of the Tariff Classification Act of 19..."
"The Tariff Schedules of the United States shall become effective as to articles entered, or withdrawn from warehouse, for consumption on or after August 31, 1963."
"No, there has been no such plan."
"I think it is very important that we get a vote on both of these issues this year."