The civilian composition of the CM board was mentioned earlier. Where the accused is a civilian but is not ex-Service, the board should be entirely civilian. Where the accused is ex-Service, the court may consist of either civilian lay members or Service lay members, or be a mixed board.
Someone else queried how such a board could have dealt with classified information. Regardless of the accused's former employment I don't see why this CM would have needed to hear classified information, but if that was ever an issue there should be no difficulty forming a board of adequately cleared defence civilians.