71.013. 1. No member of a railroad train or yard crew shallbe held criminally guilty of any responsibility of violating astate law or any municipal ordinance regulating the occupying orblocking of any street or highway railroad crossing-at-grade bytrains or cars, upon reasonable proof that his action wasnecessary to comply with the order or instructions, eitherwritten or verbal, of his employer or its officers or supervisoryofficials; and provided, that nothing in this section shallrelieve the employer or railroad from any responsibility placedupon said employer or railroad by any such state law or anymunicipal ordinance.
2. Every person, firm, company, or corporation, operating arailroad as a common carrier in the state of Missouri andviolating the provisions of this section, shall be fined not lessthan fifty dollars for each separate offense.
(L. 1969 H.B. 124 ยงยง 1, 2)