Section 77. Equipment of engines

It shall be unlawful for any railroad
  company to use within the state on its  line  or  lines  any  locomotive
  engine  not equipped with a power driving wheel brake and appliances for
  operating the train brake  system,  or  to  use  any  locomotive  engine
  operated  by steam not equipped with a mechanically operated door to the
  fire box of such locomotive engine, or to use any locomotive engine  not
  equipped  with  a vestibuled cab.  Such mechanically operated door shall
  be so constructed and operated by steam, compressed air, electricity  or
  other  means,  and such vestibuled cab shall be so constructed as deemed
  best and most efficient by the officers of such railroad. The device for
  operating such door shall be so constructed that it may be  operated  by
  the  fireman on said engine by means of a push button or other appliance
  located in or near the floor of the deck or floor of  the  tender  at  a
  suitable distance from such door to enable the fireman while firing such
  engine,  by  pressure  with his foot to open such door for the firing of
  such engine, and such vestibuled cabs shall  be  so  constructed  as  to
  attach  to the sides of, and enclose all openings between the engine cab
  and the water tank or coal tender attached  to  such  engine;  provided,
  however,  that nothing in this section shall be construed to inhibit the
  passage of a locomotive engine not so equipped  with  such  mechanically
  operated  door or vestibuled cab, moving under its own steam either with
  or without a train, when such movement is  from  a  point  without  this
  state through and to a point beyond its borders, or from a point without
  this  state to a point within it, or from a point within this state to a
  point without it if such passage is for the purpose of moving it  to  or
  from a repair shop or shops for the purpose of repairing such locomotive
  engine, and when it is not intended for service within this state.