I have a 10,500 sq/ft banquet hall that is being updated (no walls being moved or major renovations). The existing fire alarm was installed in 1994 and is operational. Is the system required to be replaced at this point or can they continue using it under the code ? Also, are they required to bring it up to the current NFPA 72 standard? They are updating the bathroom to ADA requirements and I am not sure if that opens the door for audible/visual requirements of the alarm. Thanks for any advice in advance.