is an elevator lobby/corridor considered as a occupied spaces

I am working on a residential apartment. Elevator lobby/corridor, which is used by 2~3 dwelling units per floor, are unconditioned and naturally ventilated (one window). 1. ASHRAE defines occupied space as an enclose space intended for human activities, excluding those spaces intended primarilary for other purposes, such as storage rooms and equipment rooms, that are only occupied occasionally and for short periods of time. Since elevator lobby/corridor has some human activitity of waiting for an elevator, I guess it's not reasonable to treat the elevator lobby as storage/equipment rooms. What's your thought on this? 2. Does CIBSE offer guideline for ventilating an unconditioned corridor/lobby? Thank you