Section 21. Assistance to other states, the Dominion of Canada, property ceded to the federal government and to Indian reservations

1.  Whenever
  an  ambulance company or ambulance department in this state shall answer
  a call to furnish assistance to any political subdivision  or  territory
  of  another  state of the United States or of the Dominion of Canada, or
  property ceded to the federal government, the provisions of this chapter
  shall apply with respect to the  volunteer  ambulance  workers  of  such
  ambulance company or department, while such assistance is being rendered
  or  while going to or returning from the place from where the assistance
  is to be or was rendered, to the same extent and in the same  manner  as
  if such service had been rendered in or for the area regularly served by
  such volunteer ambulance workers; provided, however, that there shall be
  deducted  from  any  amounts  payable  under  this  chapter  any amounts
  recoverable by or payable to any such volunteer ambulance  worker  under
  the  laws applicable in the political subdivision or territory for which
  the call for assistance was made.
    2. The  provisions  of  this  chapter  shall  apply  with  respect  to
  volunteer  ambulance  workers  of  ambulance  departments  and ambulance
  companies of other states of the United States and of  the  Dominion  of
  Canada  who  render  service  in  this  state  in  answer  to a call for
  assistance to the territory regularly served by an ambulance  department
  or ambulance companies described in subdivisions one to five, inclusive,
  of  section  thirty of this chapter and, for the purposes of determining
  liability for benefits under this chapter, any such volunteer  ambulance
  worker  shall  be  considered  as  a  volunteer  member of the ambulance
  department or ambulance company of the territory for which  service  has
  been  rendered in this state pursuant to a call for assistance; provided
  that the laws of the state served by such volunteer  ambulance  workers,
  ambulance  departments  or  ambulance  companies,  or of the Dominion of
  Canada, as the case may be, contain provisions under which benefits  are
  granted in relation to volunteer ambulance workers of this state who are
  killed  or  injured  when rendering service in such other states, or the
  Dominion of Canada, as the  case  may  be,  in  answer  to  a  call  for
  assistance;  provided,  however,  that  there shall be deducted from any
  amounts payable under the provisions of  this  chapter  to  a  volunteer
  ambulance  worker of such other states or of the Dominion of Canada, any
  amounts recoverable by or payable to  such  volunteer  ambulance  worker
  under the laws of the state served by such volunteer ambulance worker or
  of the Dominion of Canada, as the case may be.
    3. Whenever an ambulance company or ambulance department in this state
  shall  answer  a  call  for  assistance to be rendered to any part of an
  Indian reservation the provisions  of  this  chapter  shall  apply  with
  respect  to the volunteer ambulance workers of such ambulance company or
  department, while such assistance is being rendered or while going to or
  returning from the place from where the  assistance  is  to  be  or  was
  rendered,  to  the same extent and in the same manner as if such service
  had been rendered in or for the area regularly served by such  volunteer
  ambulance workers.