Final answer:
Basements, habitable attics, and sleeping rooms must have an operable window and door for safety purposes.
Step-by-step explanation:
Basements, habitable attics, and every sleeping room are required to have at least one operable window and door.
Building codes in many MDCs specify safety requirements for houses to be considered livable. These requirements include running water, ventilation, heating systems, structural safety, smoke detectors, and properly installed electrical wiring.