John Kennedy actually said...
I, John F. Kennedy, President of the United States of America, acting under and by virtue of the authority vested in me by section 22(d) of the Agricultural Adjustment Act, as amended, do hereby amend, effective immediately, List H appended to the said Proclamation No. 3019
Context
Proclamation 3460—Modifying the Quota for Certain Blue-Mold Cheese
03/28/1962