Executive Order 4705—Rules of Official Precedence
08/09/1927
https://www.presidency.ucsb.edu...
It is never possible to make much of a determination in advance of what the action of the Senate will be relative to the...
On and after October 1, 1926, only those embassies and legations and other diplomatic missions of the United States spec...
But I haven't seen any plan up to the present time that seemed to be feasible.
I always tell people that I have so many places still to go to in the United States that I don't know when those will be...