Section 142. Workmen's compensation insurance on public works

Each contract
  to  which  the  state,  any  public department or official thereof, or a
  commission appointed pursuant to law is a party and which is of  such  a
  character  that the employees engaged thereon are required to be insured
  by the provisions of the workmen's  compensation  law  shall  contain  a
  stipulation  that  the  same  shall  be void and of no effect unless the
  person or  corporation  making  or  performing  the  same  shall  secure
  compensation  for  the  benefit  of, and keep insured during the life of
  said contract, such employees, in compliance with the provisions of such
  law.