I'm working on a project that has two structures connected through a suspended walkway. The first consists mainly of warehouse areas (distribution centre) with some auxilliary office areas. The other one consists of office areas and support areas to the warehouse (locker rooms, showers, etc.). At this stage it isn't yet defined if the walkway that connects the two structures will be interior space or not. Can these two structures be considered a single building and lead to a single LEED certificate?

I am aware that the "Supplemental Guidance to the MPR rev2" has a definition of "one building" stating that structures connected by a hallway may be considered a single building if two conditions are met:
a) Space that can be included in the gross floor area of the project that serves a purpose other than parking or the circulation of people is contiguous throughout the structure.
b) All building components of the LEED project that are addressed by LEED prerequisites and pursued credits (systems, materials, etc) can be treated as one, such that separate reviews of the same issues are not required for different portions of the superstructure.

However, I'm not sure if i'm interpreting them correctly.

The first criteria implies that the hallway must have interior spaces other than circulation or parking?

Can the second criteria be fulfilled if all prerequisites and credits are assessed as a whole (eg. single energy simulation of the whole structure; water consumption calculations for the total FTE's, materials cost for the whole structure, etc.)?