Section 63. Persons employed as drivers, conductors, motormen or gripmen

Any railroad corporation may employ any inhabitant of the state, of  the
  age  of  twenty-one  years,  not  addicted  to  the  use of intoxicating
  liquors, as a car driver, conductor, motorman  or  gripman,  or  in  any
  other  capacity,  if  fit  and  competent  therefor.  All applicants for
  positions as motormen or gripmen on any street surface railroad in  this
  state  shall  be  subjected to a thorough examination by the officers of
  the corporation as to their habits, physical ability  and  intelligence.
  If  this  examination  is satisfactory, the applicant shall be placed in
  the shop or power house where he can be made familiar with the power and
  machinery he is about to control. He shall then be placed on a car  with
  an  instructor,  and  when the latter is satisfied as to the applicant's
  capability for the position of motorman or gripman, he shall so  certify
  to  the  officers of the company, and, if appointed, the applicant shall
  first serve  on  the  lines  of  least  travel.  Any  violation  of  the
  provisions of this section shall be a misdemeanor.