Section 418. Additional benefit authorized with respect to the city of Yonkers

Notwithstanding any contrary provision of  law,  the  city  of
  Yonkers  may by local law, ordinance or resolution, provide a benefit of
  two hundred fifty dollars a month to the widow or widower,  and  members
  of  the  family,  of  retired  Yonkers'  policemen  and firemen who were
  members of the New  York  state  policemen's  and  firemen's  retirement
  system at the time of their death; provided, however, the benefit may be
  paid  only  to  survivors  who were receiving benefits pursuant to Local
  Laws seven and eight of the city of Yonkers for  the  year  of  nineteen
  hundred sixty-eight on or before the effective date of this section.