Section 27-2053. Obligations of owner

a. The owner of a multiple dwelling
  shall provide adequate janitorial services.
    b. In a multiple dwelling of nine or more dwelling  units,  the  owner
  shall either:
    (1)  Perform  the janitorial services himself or herself, if he or she
  is a resident owner; or
    (2) Provide a janitor; or
    (3)  Provide  for  janitorial  services   to   be   performed   on   a
  twenty-four-hour-a-day basis in a manner approved by the department.
    c.  The  owner  of a multiple dwelling or his or her managing agent in
  control shall post  and  maintain  in  such  dwelling  a  legible  sign,
  conspicuously   displayed,   containing   the  janitor's  name,  address
  (including apartment number) and telephone number. A new  identification
  sign  shall be posted and maintained within five days following a change
  of janitor.