10 U.S. Code § 720 - Chief of Staff to President: appointment
The President, by and with the advice and consent of the Senate, may appoint a general officer of the Army, Air Force, or Marine Corps or a flag officer of the Navy as the Chief of Staff to the President and may designate such position as a position of importance and responsibility under section 601 of this title.
For provisions to prevent extinction or premature termination of rights, duties, penalties, or proceedings that existed or were begun prior to the effective date of Pub. L. 96–513 and otherwise to allow for an orderly transition to the system of officer personnel management put in place under Pub. L. 96–513, see section 601 et seq. of Pub. L. 96–513, set out as a note under section 611 of this title.
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