Unless a bathroom is intended for use only by persons outside of a building, no door to the bathroom shall open to the outside of the building in which it is located.
Access to a bathroom shall be from within the building or the part of the building that the bathroom is intended or required to serve.
Passageways leading to bathrooms shall be arranged so that each bathroom is readily accessible from all parts of the building it is intended or required to serve without having to go outside the building.
A bathroom may not be used as the only entrance to any other room.
D.C. Mun. Regs. tit. 14, r. 14-604