LEED EB O&M Project Boundary

There are 3 buildings in a single site and these 3 buildings have a shared basement parking. I would like to know if 2 buildings from this site can be certified together under the LEED EB rating system? For more information, we referred the certification guidance for attached buildings and it states that the LEED EB system may not use this guidance for horizontally attached buildings. Hence my understanding is that, a horizontally attached building is not eligible for LEED EB O&M Rating system or should I refer any other books/guidance to clarify my doubt. Please do comment on this.