"Emergency Communications Systems. Understanding the Challenges of MNS. The New Chapter 24, NFPA 72-2010". Presented by Wayne D. Moore, P.E., Principal, Hughes Associates, Inc. Probably the most important change to the Code was the addition of a new chapter for Emergency Communications Systems. This chapter includes not only a revised emergency voice/fire alarm communications systems section but also the new Mass Notification Systems (MNS) requirements. Mr. Moore will provide an overview of the requirements in the new Chapter 24 of NFPA 72-2010 that you need to know to properly design and install mass notification systems for your customers.