Thermal Blocks - HVAC Zones Not Designed

We are modeling a new construction mall, and I would like to get another perspective on how to approach the zoning. The project will be applying for certification under LEED 2009 Core and Shell. The current design has tenant spaces that will be built out per typical mall layout - stores on the interior and exterior, with a central walkway/corridor. The overall mall design incorporates natural ventilation, and tenants will be responsible for implementing their own HVAC systems if they feel they need it. There are a variety of stores/rooms lining the exterior of the building, some larger than others. My question is what is the understanding of "spaces" under Appendix G Table G3.1.8: Table G3.1.8.a: "Separate thermal blocks shall be assumed for interior and perimeter spaces. Interior spaces shall be those located greater than 15 ft from an exterior wall. Perimeter spaces shall be those located within 15 ft of an exterior wall." Table G3.1.8.b: "Separate thermal blocks shall be assumed for spaces adjacent to glazed exterior walls... Each zone shall include all floor area that is 15 ft or less from a glazed perimeter wall..." In Table G3.1.8.a it refers to "spaces." Is this a reference to floor area or rooms? If I have a row of stores 40ft deep on the same perimeter facade, with no glazing, the whole row would be modeled as one thermal block? If the stores are glazed then I would have one thermal block that would be 15 ft deep on the perimeter, and another thermal block that is 25ft deep as an interior zone? Thanks in advance.