New York Laws
Title 1 - Light and Air
29 - Painting of Courts and Shafts.

ยง 29. Painting of courts and shafts. The exterior surface of all walls
of all courts and shafts of multiple dwellings, except of outer courts
opening on a street, and courts having dimensions of at least fifty
percent in excess of the minimum set forth in section twenty-six, shall
be of a lightcolored brick or stone, or be thoroughly whitewashed or
painted a light color by the owner and be so maintained. Such whitewash
or paint shall be renewed whenever necessary, as may be determined and
required by the department.