A member of a reserve component who is separated for cause, except under section 12684 of this title, is entitled to a discharge under honorable conditions unless—

(1) the member is discharged under conditions other than honorable under an approved sentence of a court-martial or under the approved findings of a board of officers convened by an authority designated by the Secretary concerned; or

(2) the member consents to a discharge under conditions other than honorable with a waiver of proceedings of a court-martial or a board.