For anyone wondering, this is the last line from Article 1, Section 9 of the US Constitution:
“No Title of Nobility shall be granted by the United States: And no Person holding any Office of Profit or Trust under them, shall, without the Consent of the Congress, accept of any present, Emolument, Office, or Title, of any kind whatever, from any King, Prince or foreign State.”
In other words, Congress is the one that will have to approve the use of this 747-8 as a temporary replacement for the VC-25. The President can’t do that on his own.