At any time before a court martial is sworn or affirmed, the Registrar may revoke the appointment of an officer to be a member or reserve member of the court martial or the judge advocate and appoint an officer to be a member or reserve member or the judge advocate, as the case may be, in the place of that first - mentioned officer.
Note: The Registrar must not appoint a person as the judge advocate of a court martial unless the person has been nominated by the Judge Advocate General: see section 129B.