Functional Entry for Addition Project

Our project is a four storey addition to an existing four storey building. There are a few doors that connect the addition and the existing building throughout its four storeys, along with several secondary and/or service entrances and emergency exists. The majority of occupants will enter the addition through the existing building. In determining the most appropriate "Functional Entry" to use for proximity to transit, should the project: a) use the demising wall between the existing building and addition as the "Functional Entry", OR b) use the secondary exterior entrances as the "Functional Entry", OR c) use the existing building's primary entrance as the "Functional Entry."