law: 134. Summoning of witnesses.
  (1) Every person who may be required to give evidence or produce a document before a court-martial shall be summoned in the prescribed manner in writing under the hand of the Judge Advocate General of the Navy or the trial judge advocate.
  (2) Every person who may be required to give evidence before a commanding officer or the officer preparing a summary of evidence in accordance with the regulations made under this Act or before a board of inquiry shall be summoned in the prescribed manner by writing under the hand of the Judge Advocate General of the Navy or the senior officer in the station or such other officer prescribed in this behalf.
  (3) In the case of a witness subject to naval law or to the law relating to the Government of the regular Army or the Air Force, the summons shall be served in the manner prescribed.
  (4) In the case of any other witness, the summons shall be served either in the prescribed manner, or it shall be sent to the magistrate within whose jurisdiction the witness may be or resides and such magistrate shall give effect to the summons as if the witness were required in the court of such magistrate.
  (5) When a witness is required to produce any particular document or thing in his possession or power, the summons shall describe it with reasonable precision.
  (6) Every person not subject to naval law who may be summoned as aforesaid shall be allowed and paid such reasonable expenses as may be prescribed.
  (7) Nothing in this section shall be deemed to affect the operation of sections 123 and 124 of the Indian Evidence Act, 1872 (1 of 1872), or to apply to any document in the custody of the postal or telegraph authorities.