Section 209-A. Relations with other states and the dominion of Canada

1.
  Whenever a volunteer fire company or  department  of  this  state  shall
  answer a call for assistance from 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 section  two
  hundred  five  of  this  chapter  and  the  provisions  of the workmen's
  compensation law shall apply with respect to the  volunteer  firemen  of
  such fire company or department, while such assistance is being rendered
  or  while  going  to  or  returning from the place from whence such call
  came, to the same extent and in the same manner as if such  service  had
  been  rendered  in  the area regularly served by such volunteer firemen;
  provided, however, that there shall be deducted from any amounts payable
  under such section or such law, any amounts recoverable by or payable to
  such volunteer firemen  under  the  laws  applicable  in  the  political
  subdivision or territory from whence the call for assistance came.
    2. The provisions of sections two hundred five and two hundred nine of
  this  chapter  shall  apply  with  respect  to  volunteer  firemen, fire
  departments and companies of other states of the United  States  and  of
  the  Dominion of Canada that render service in this state in answer to a
  call for assistance, provided that the laws of the state served by  such
  volunteer  firemen, fire departments or companies, or of the Dominion of
  Canada, as the case may be, contain provisions under which substantially
  similar benefits are granted to volunteer firemen, fire departments  and
  companies  of this state when rendering service in such other states, or
  the Dominion of Canada, as the case may be, in  answer  to  a  call  for
  assistance,  and  provided further that there shall be deducted from any
  amounts payable under the provisions of section two hundred five of this
  chapter to volunteer firemen of such other states or of the Dominion  of
  Canada,  any amounts recoverable by or payable to such volunteer firemen
  under the laws of the state served by such volunteer firemen or  of  the
  Dominion of Canada, as the case may be.
    3.  The  provisions  of this section shall not apply where a volunteer
  fireman of this state, or of  another  state,  or  of  the  Dominion  of
  Canada,  as the case may be, is killed or injured, on or after the first
  day of March, nineteen hundred fifty-seven, or dies from the effects  of
  injuries received on or after such date.