2006 New York Code - Janitor Or Housekeeper.

 
    §  83.  Janitor  or  housekeeper.  Whenever there are thirteen or more
  families occupying any multiple dwelling and the owner does  not  reside
  therein,  there  shall  be  a  janitor, housekeeper or some other person
  responsible on behalf of the owner who shall reside in said dwelling, or
  within a dwelling located within a distance of  two  hundred  feet  from
  said  dwelling,  and have charge of such dwelling, except that where two
  or three multiple dwellings are connected  or  adjoining,  one  resident
  janitor  shall  be  sufficient. In every garden-type maisonette dwelling
  project erected after April  eighteenth,  nineteen  hundred  fifty-four,
  adequate personnel shall be provided for the lawful care and maintenance
  of such project.