(1) Upon the final military review of a sentence of a general court-martial or of a sentence to a dishonorable discharge by a special court-martial, the accused has the right to be represented by counsel before the reviewing authority.

  (2) Upon the request of an accused entitled to be represented, the convening authority shall appoint a commissioned officer who is a member of the bar of this state to represent the accused before the reviewing authority or before the staff judge advocate, and before the state judge advocate general, in the review of cases specified in subsection (1).

  (3) An accused entitled to be represented may be represented by civilian counsel if provided by the accused before the reviewing authority, the staff judge advocate, or legal officer and before the state judge advocate general.