10/16/1960
https://www.presidency.ucsb.edu...
"I determine that it is desirable and appropriate to delay the effective dates of such Proclamations of March 19, 1962."
"I want to express my appreciation to you for your statement, and also for the support that your statement has been given by some of the most distinguished members of the medical profession in the Unit..."
"And therefore, doctor, and the other members of this committee, I want to say that in supporting this I believe that you are helping to meet the very great responsibility which the medical profession ..."
"Now, Therefore, I, John F. Kennedy, President of the United States of America, under and by virtue of the authority vested in me by the Act of June 8, 1906 (34 Stat. 225; 16 U.S.C. 431), do proclaim t..."