Section 7-130. Ballots; examination by voters and instruction in use of voting machines

One or more voting machines  which  shall  contain  the
  ballot  labels,  showing  the  party emblems and title of officers to be
  voted for, and which shall so far as practicable contain  the  names  of
  the  candidates to be voted for, shall be placed on public exhibition in
  some suitable place by the board of elections, in  charge  of  competent
  instructors,  for  at  least  three  days  during  the  thirty days next
  preceding an election. No voting machine which is to be assigned for use
  in an election shall be used for such purpose after having been prepared
  and sealed for the election. During such public exhibition, the counting
  mechanism of the machine shall be concealed from view and the doors  may
  be  temporarily  opened  only  when  authorized by the board or official
  having charge and control of the election. Any voter shall be allowed to
  examine such machine, and upon request shall be instructed in its use.