(1) Where the President is unable to attend at any time after the accused person's plea of not guilty or guilty has been recorded by a court martial, the next senior member shall become the President of the court martial and the first - mentioned President shall take no further part in the proceedings.
(2) Where a member of a court martial is unable to attend at any time after the accused person's plea of not guilty or guilty has been recorded by a court martial, that member shall take no further part in the proceedings.