Section 122. Contracts between railroad companies and bus companies owned by former; approval of commissioner

Whenever the commissioner has made an
  order authorizing any street railroad company  or  railroad  company  to
  substitute  the operation of stages, buses or motor vehicles in place of
  cars or trains upon tracks on any portion of the route of such railroad,
  and such company is the owner of all of  the  capital  stock  of  a  bus
  company,  such  street railroad company or railroad company and such bus
  company may, subject to the approval of the commissioner,  contract  for
  the  use  of  their  respective  routes, or any part thereof, upon which
  stages, buses or motor vehicles may be operated, and such  routes  shall
  thereafter be used in such manner and for such time as may be prescribed
  in such contract.