Comment by dsr_

The emergency location is for 911 dispatch. The theory goes that in the time of wired phones, a call from 212 555 1212 was definitely from the phone on the 11th floor of 60 Hudson Street, so the correct police/fire/ambulance would be obviously in South Manhattan -- but now that we have VOIP and softphones, the phone could be anywhere -- so which 911 point-of-presence should handle it?

Hence the explicit statement.