Any person subject to this Act who commits any of the following offences, that is to say,--
         (a) being duly summoned or ordered to attend as a witness before a court- martial, wilfully or without reasonable excuse, makes default in attending; or
         (b) refuses to take an oath or make an affirmation legally required by a court-martial to be taken or made; or
         (c) refuses to produce or deliver any document in his power or control legally required by a courtmartial to be produced or delivered by him; or
         (d) refuses when a witness to answer any question which he is by law bound to answer; or
         (e) is guilty of contempt of court-martial by using insulting or threatening language, or by causing any interruption or disturbance in the proceedings of such court;
shall, on conviction by court-martial, be liable to suffer imprisonment for a term which may extend to three years or such less punishment as is in this Act mentioned.