The complete list of exemptions and details can be found in RCW 19.27A.210(7)(c) and Section Z4.1 of the Standard. Learn more about the Clean Buildings Performance Standard. Exemptions include: No certificate of occupancy Less than 50% of conditioned floor area unoccupied Less than 50,000 square feet of conditioned space More than 50% of floor area designated as Factory Group F or High Hazard Group H by the Washington state edition of the International Building Code (WA IBC) Agricultural structures Building is pending demolition Financial hardship