... He [the President] shall have power, by and with the advice and consent of the Senate, to make treaties,
provided two thirds of the senators present concur; and he shall nominate, and by and with the advice and
consent of the Senate, shall appoint ambassadors, other public ministers and consuls, judges of the Supreme
Court, and all other officers of the United States, whose appointments are not herein otherwise provided for, and
which shall be established by law: but the Congress may by law vest the appointment of such inferior officers, as
they think proper, in the President alone, in the courts of law, or in the heads of departments. -
Source: Article II, Section 2, Clause 2, Constitution of the United States
Which constitutional principle is represented in the document?