105 C.M.R. 410.300
The owner of a residence shall provide the following for electrical supply and illumination:
(A) Habitable rooms other than a kitchen:
(B) Kitchen:
(D) Spaces other than habitable rooms, kitchens, or rooms containing a toilet, bathtub, or shower:
(1) Electric light switches or sensors, and light fixtures in good working order if light from an adjacent area does not provide sufficient illumination for the safe and reasonable use of the following spaces:
(2) Electric light switches or sensors, and light fixtures in good working order shall be installed in the following spaces:
(3) In residences containing more than one dwelling unit or rooming unit, light fixtures in good working order that are motion-sensor operated, on timers, or always on to ensure sufficient illumination for the safe and reasonable use of every shared:
(F) Payment of Electrical Service in Residences Containing Two or Three Dwelling Units. 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: