Jimmy Carter actually said...
This Proclamation shall become effective, said Agreement shall enter into force according to its terms, and nondiscriminatory treatment shall be extended to the products of the Hungarian People's Republic in accordance with the terms of the said Agreement, on the date of exchange of written notices of acceptance in accordance with Article XI of the said Agreement.
Context
Proclamation 4560—Agreement on Trade Relations Between the United States of America and the Hungarian People's Republic
04/06/1978