Section 410.254 - Light in Passageways, Hallways, and Stairways(A) Except as allowed in 105 CMR 410.254(B), the owner shall provide light 24 hours per day so that illumination alone or in conjunction with natural lighting shall be at least one foot candle as measured at floor level, in every part of all interior passageways, hallways, foyers and stairways used or intended for use by the occupants of more than one dwelling unit or rooming unit:(B) In a dwelling containing three or fewer dwelling units, the light fixtures used to illuminate a common hallway, passageway, foyer and/or stairway may be wired to the electric service serving an adjacent dwelling unit provided that if the occupant of such dwelling unit is responsible for paying for the electric service to such dwelling unit: (1) a written agreement shall state that the occupant is responsible for paying for light in the common hallway, passageway, foyer and/or stairway; and(2) the owner shall notify the occupants of the other dwelling units.