What are the powers of nomination and appointment?

When persons are to be employed to perform the duties of certain influential public offices, none can be eligible but those whom the President first nominates; that is, whom he proposes to the Senate, and whom the Senate consents to have so employed: and when the Senate has given this consent, the persons cannot act in their office until they receive orders to do so from the President; such an order is called their appointment, and when put in writing it is called their commission.