GSF not part of initial fit-out or alteration - PI form 2

I'm assuming you're asking about the CI - 2009 form. I've not seen this used, but imagine it might apply if you are including a space in the LEED project area because it is part of the tenant's leased area but may not be undergoing renovation. Perhaps a storage room, work room, or other support space is being re-used from the previous tenant's plan without being altered. Since it is part of the overall office area, you'd want to include it in the project boundary, but use this form field to distinguish that area from other areas undergoing alteration. If you are pursuing LEED CI, the core areas such as elevators & lobbies, common restrooms, mechanical rooms, would not typically be included in the LEED project boundary since those are not the tenant space and are typically a different scope of work. Hope that explains it.