An office building that is being certified under LEED C&S will have 80% of its gross floor area without a complete interior fit-out at time of construction work completion. This area will be left as an open-space and with this layout it will comply with IEQc8.1 requrements. However, in the future the tenant may add partition walls and floor finishing to customize the open-space layout. How can we demonstrate compliance with this credit requirement?