The President's News Conference
01/22/1947
https://www.presidency.ucsb.edu...
This is your bread and butter.
And provided further, that the provision of section 1(e) of the said title 17, so far as they secure copyright controlling parts of instrume...
Now, Therefore, I, Harry S. Truman, President of the United States of America, do declare and proclaim:
Provided, that the enjoyment by any work of the rights and benefits conferred by the said title 17 shall be conditioned upon compliance with...