"ATIS-1000013.2007 [Ref 1] and ATIS-1000013.a.2009 [Ref 2] specify two methods for delivering Content Associated Communications Identifying Information (CACmII) to the LEA: the Packet Data Header Report and the Packet Data Summary Report. This TR specifies how byte count of IP packets is to be reported in a Packet Data Header Report and a Packet Data Summary Report (i.e.@ in addition to the other IP layer-3 and layer-4 information included in these messages) as specified in [Ref 1] and [Ref 2]. The byte count reporting capability is not intended to be a standalone capability@ but rather builds on [Ref 1] and [Ref 2]. Events that trigger reporting of the Packet Data Header Report or the Packet Data Summary Report as specified in [Ref 1] and [Ref 2] shall instead trigger reporting of the Packet Data Header Report or the Packet Data Summary Report as specified in this TR. Creation of this TR is premised upon the understanding that byte count in the Packet Data Header Report of [Ref 1] and associated supplement(s) is not currently part of the safe harbor CALEA requirements. This TR makes no representation regarding byte count information being provided pursuant to a lawful authorization that does not include a full content intercept. Any requirements or standards language (i.e.@ ""shall""@ ""should"") is used strictly in the context of ensuring that this TR is inherently sound and provides appropriate guidance to voluntary implementers. This TR specifies LAES capability of reporting byte count in the Packet Data Header Report and Packet Data Summary Report messages in an IAS environment. Purpose This TR is provided as a specification of byte count reporting capability with minor modifications to [Ref 1] and [Ref 2]."