(1) Whenever a court martial is ordered such timely notice as may be practicable and which, as a general rule, shall not be less than ninety-six hours, or on active service, not les than twenty-four hours, shall be given by general orders or by signal to the ships present so that the proper officers may be prepared to attend at the place and hour appointed.
(2) The names of the president and of the officers whose presence it is anticipated will be required shall be made known and after it is made known, no officer junior to the president of a rank eligible to sit as a member shall proceed on leave of absence without the express authority of the convening authority or in his absence from the place where the court martial is to be held, of the senior Naval Officer present.