577.703.  Bus hijacking, penalty — assault with intent to commit bus hijacking, penalty, with a deadly weapon, penalty — possession and concealment of deadly weapon by passenger, penalty, exception. — 1.  A person commits the offense of bus hijacking if he or she seizes or exercises control, by force or violence or threat of force or violence, of any bus.  The offense of bus hijacking is a class B felony.

  2.  The offense of "assault with the intent to commit bus hijacking" is defined as an intimidation, threat, assault or battery toward any driver, attendant or guard of a bus so as to interfere with the performance of duties by such person.  Assault to commit bus hijacking is a class D felony.

  3.  Any person, who, in the commission of such intimidation, threat, assault or battery with the intent to commit bus hijacking, employs a dangerous or deadly weapon or other means capable of inflicting serious bodily injury shall, upon conviction, be guilty of a class A felony.

  4.  Any passenger who boards a bus with a dangerous or deadly weapon or other means capable of inflicting serious bodily injury concealed upon his or her person or effects is guilty of the felony of "possession and concealment of a dangerous or deadly weapon" upon a bus.  Possession and concealment of a dangerous and deadly weapon by a passenger upon a bus is a class D felony.  The provisions of this subsection shall not apply to duly elected or appointed law enforcement officers or commercial security personnel who are in possession of weapons used within the course and scope of their employment; nor shall the provisions of this subsection apply to persons who are in possession of weapons or other means of inflicting serious bodily injury with the consent of the owner of such bus, his or her agent, or the lessee or bailee of such bus.