Modify Established Project Boundary?

The client for our CI-2009 project has decided to expand their footprint within the existing building to include more office spaces. The MPR defines "complete interior space" as "distinct from other spaces within the same building with regards to at least one of the following characteristics: ownership, management, lease or party wall separation." This expansion office space would be included in the end user's lease and be under their management. We have registered the project and gone through the preliminary Design Review Process with the initial Project Boundary and gotten our comments back. Do we alter the Project Boundary to include the 2500sf of expansion office space so that we meet the MPR for a complete interior space and if so how do we go about indicating that in our documentation? Thank you for your assistance.