The Secretary shall from time to time appoint boards to hear appeals of major adverse actions described in
section 7462 of this title. Such boards shall be known as Disciplinary Appeals Boards. Each board shall consist of three employees of the Department, each of whom shall be of the same grade as, or be senior in grade to, the employee who is appealing an adverse action. At least two of the members of each board shall be employed in the same category of position as the employee who is appealing the adverse action. Members of a board shall be appointed from individuals on the panel established under subsection (d).