2006 New York Code - Service Of Notices And Orders.

 
    §  26-117 Service of notices and orders. Except for such orders as may
  be served pursuant to section three hundred twenty-six of  the  multiple
  dwelling  law,  service of notices and orders issued by the commissioner
  may be made: (a) by delivery of a copy thereof personally to the  owner,
  lessee  or  occupant  of  the  building,  premises  or property affected
  thereby; or (b) by delivery of a copy thereof personally to  any  person
  of suitable age and discretion in charge or apparently in charge of such
  building,  premises  or  property,  or  any building work being executed
  thereon; or (c) by posting a copy thereof in a  conspicuous  place  upon
  such  building,  premises  or property and mailing a copy thereof to the
  owner of such building, premises or property at his or  her  last  known
  address,  in  which latter case the service shall be deemed to have been
  effected three days after the date of mailing.