20 ILCS 1807/47

Refusal to appear or testify. (a) Any person not subject to this Code who: (1) has been duly subpoenaed to appear as a witness or to produce books and records before a court-martial or court of inquiry, or before any military or civil officer designated to take a deposition to be read in evidence before such a court; (2) has been duly paid or tendered the fees and mileage of a witness at the rates allowed to witnesses attending a criminal court of this State; and (3) willfully neglects or refuses to appear, or refuses to qualify as a witness or to testify or to produce any evidence which that person may have been legally subpoenaed to produce; may be punished by the military court in the same manner as a criminal court of this State. (b) The fees and mileage of witnesses shall be advanced or paid out of the appropriations for the compensation of witnesses.