Final answer:
Locks and latches are only permitted in specific instances for egress, including emergency and fire escape doors.
Step-by-step explanation:
Locks and latches are only permitted in specific instances for egress, which refers to a means of exit or way out of a building. These instances include emergency exit doors, fire escape doors, and doors leading to hazardous areas such as mechanical rooms or chemical storage areas. These locks and latches are designed to ensure the safety and security of building occupants while still allowing for quick and easy evacuation in case of an emergency.