Noise Abatement Ordinance
(NAO)

¹ Ex­tern­al build­ing ele­ments form the ex­tern­al bound­ary of a room (e.g. win­dows, ex­tern­al doors, ex­tern­al walls, roofs).

² Par­ti­tions (e.g. in­tern­al walls, ceil­ings, doors) serve to sep­ar­ate in­di­vidu­al units, such as dwell­ings, with­in the build­ing.

³ Build­ing fa­cil­it­ies are fixed in­stall­a­tions such as heat­ing, vent­il­a­tion, sup­ply and dis­pos­al sys­tems, lifts and wash­ing ma­chines.