20. Striking or threatening superior officer.-
Any person subject to this Act who commits any of the following offences, that is to say,-
(a) uses criminal force to or assaults his superior officer; or
(b) uses threatening language to such officer; or
(c) uses insubordinate language to such officer, shall, on conviction by a Security Guard Court,-
(i) if such officer is at the time in the execution of his office or, if the offence is committed on active duty, be liable to suffer imprisonment for a term which may extend to fourteen years or such less punishment as is in this Act mentioned; and
(ii) in other cases, be liable to suffer imprisonment for a term which may extend to ten years or such less punishment as is in this Act mentioned: Provided that in the case of any offence specified in clause (c), the imprisonment shall not exceed five years.