The following text reflects the agreed modification for a third amendment to ITU-T Rec. G.991.2 (2003). Amendment 3 contains an update to ITU-T Rec. G.991.2 defining a new TPS-TC for PTM Transport based on 64/65-octet packet encapsulation. The text modifications relative to ITU-T Rec. G.991.2 (2003) are shown with revision marks.