2019 New York Laws
EXC - Executive
Article 19 - Display and Use of the Flag of the United States of America in Parks and on Public Buildings
403-A - Display of Prisoner of War and Missing in Action Flag.

§  403-a.  Display  of  prisoner of war and missing in action flag. 1.
  Every county outside the city of New York, city, town,  and  village  is
  encouraged  to display the prisoner of war and missing in action flag at
  the building housing its local legislative body on all days on which the
  flag of the United States of America is displayed. Every county  outside
  the  city  of  New  York, and every city, town, and village shall fly an
  official National League of Families POW/MIA flag, as designated  by  36
  U.S.C.  902  at  the  building  housing  its local legislative body if a
  congressionally chartered  veterans  organization  including  any  post,
  chapter,  detachment  unit,  auxiliary  unit or society of such veterans
  organization has provided the county, city, town, or village  with  such
  flag and, upon such municipality's request, any necessary attachments or
  fasteners  required  to  enable the flag to be visible to the public, on
  the following days:  Armed  Forces  Day,  the  third  Saturday  in  May;
  Memorial  Day,  the  last  Monday in May; Flag Day, the second Sunday in
  June; Independence Day, July 4; National POW/MIA  Recognition  Day,  the
  third Friday in September except if such date of commemoration cannot be
  observed  due  to  a  religious  holiday, such observances shall then be
  conducted on the second Friday in September and Veterans  Day,  November
  11.
2.  Every  state  police  facility,  including  but not limited to the
  headquarters,  substations,  and  training  academy,  is  encouraged  to
  display  the  prisoner  of war and missing in action flag on all days on
  which the flag of the United States of America is displayed.