Section 27-2015. Courts and shafts

a. The owner of a multiple dwelling shall
  whitewash  the  walls  enclosing  all  courts  and  shafts  not  made of
  light-colored brick or stone or shall paint such walls  a  light  color,
  and shall maintain them in a clean condition.
    b.  As  often  as  it  deems necessary, the department may require the
  owner of a multiple dwelling:
    (1) To rewhitewash or repaint the walls enclosing  courts  and  shafts
  not made of a light-colored brick or stone; and
    (2)  To  clean  the  walls  enclosing  courts  and  shafts  made  of a
  light-colored brick or stone.
    c. This section does not apply to:
    (1) Outer courts which open on a street; or
    (2) Courts which exceed the minimum dimensions set  forth  in  section
  twenty-six of the multiple dwelling law by at least fifty percent.