Any person subject to this Act who commits any of the following offences, that is to say,
         (a) is taken prisoner or captured by the enemy, by want of due precaution or through disobedience of orders, or wilful neglect of duty, or having been taken prisoner or so captured fails to rejoin his service when able to do so; or
         (b) without due authority holds correspondence with, or communicates intelligence to, the enemy or any person in league with the enemy or having come by the knowledge of any such correspondence or communication, wilfully omits to discover it immediately to his Commandant or other superior officer,
     shall, on conviction by a Security force Court, be liable to suffer imprisonment for a term which may extend to fourteen years or such less punishment as is in this Act mentioned.