01/18/1929
https://www.presidency.ucsb.edu...
"Diplomatic visas will be granted by diplomatic missions only."
"On and after October 1, 1926, only those embassies and legations and other diplomatic missions of the United States specifically authorized to do so by the Department of State will issue passports, ex..."
"The convention and protocol had my approval and were signed by the American minister at Ottawa by virtue of full powers issued to him by me."
"I invite the attention of the Senate to the accompanying report by the Secretary of State on the subject."