Jimmy Carter, Proclamation 4610 (1978)
“ Section 201 (a) (2) of the Trade Expansion Act authorizes the President to proclaim the modification or continuance of any existing duty or other import restrictions, or such additional import restrictions as he determines to be required or appropriate to carry out any trade agreement entered into under the authority of that Act, except that pursuant to section 201 (b) (2) of the Act, the President may not by proclamation increase a rate of duty to a rate more than 50 percent above the rate existing on July 1, 1934. ”
