Operators of Shared MLTS service with residential customers are required to ensure that the telecommunications system is connected to the Public Switched Telephone Network in a manner that calls to 9-1-1 result in one distinct ANI and one distinct ALI for each living unit, unless the facility at all times maintains Alternative Methods of Notification that have been approved by the Bureau.
65- 625 C.M.R. ch. 11, § 3