Section 27-996.1. Locks on elevators and elevator hoistway doors

Notwithstanding the retroactive provisions of  section  27-994  of  this
  article,  in  high  rise  buildings and existing high rise buildings, no
  switch, lock or device of any kind shall be installed on any floor on or
  above the street floor on any elevator car or  elevator  hoistway  door,
  except  elevators  used  exclusively  for  freight,  that  shall prevent
  opening of such doors by anyone not having a key, unless fire department
  access to cars and hoistways is provided for by a city-wide standard key
  as described in reference standard RS 18-1.
    Existing high rise buildings shall comply  with  the  requirements  of
  this section on or before April first, nineteen hundred eighty-seven.