This packet is designed to deliver to Secondary clients a number that is to be used as the client ID from the Primary host, the number is individual only to each primary host, other primary hosts may utilise the same ID number but with the combination of username and ID there is usually enough scope for individuality..

[0x0460][ Packet Data Length : 2 ][ Client ID : 2 ]                                                

This packet is used primarily as part of the Secondary client logging-in process to a Primary host
The field called "Client ID" is the hexidecimal representation of the last 5 digits of the username and is often sent in the packet immediately following the header.