Section 28-118.19. Posting of certificates of occupancy

The owner shall post
  a copy of the building's certificate of  occupancy  in  accordance  with
  this  section 28-118.19, except buildings occupied entirely by group R3.
  Buildings that are not required to have a certificate of occupancy shall
  be posted by the owner with a sign or placard in a  form  prescribed  by
  the  commissioner.  The certificate of occupancy or sign, as applicable,
  shall be permanently affixed to the structure in a conspicuous  location
  in  a  public  hall,  corridor,  management office of the building or as
  otherwise prescribed by the commissioner.