"The NEMA Smart Meter Package provides the requirements and guidance on electricity metering@ watt hour meter sockets@ device data tables@ meter interfacing to data communication networks and type 2 optical ports. NEMA Smart Meter Package also establishes performance criteria for thermal demand meters@ mechanical demand registers and phase shifting devices used in metering. Test methods for transformer-rated meters and self contained ""A"" base watt hour meter are included in this package as well as a watt hour safety standard. This package contains all parts of NEMA ANSI C12 and NEMA SG-AMI 1."