2009-09-02 2023-05-23 Vincent Roca 0-63 IETF Review variable length 64-127 Specification Required variable length 128-191 IETF Review fixed length 192-255 Specification Required fixed length 0 EXT_NOP 1 EXT_AUTH 2 EXT_TIME 3-63 Unassigned 64 EXT_FTI 65 DVB-IPTV CDS Completion Poll Request LCT Header Extension ETSI TS 102 034 66 EXT_ROUTE_PRESENTATION_TIME ATSC A/331 67 EXT_TOL ATSC A/331 68-191 Unassigned 192 EXT_FDT 193 EXT_CENC 194 EXT_TOL ATSC A/331 195-255 Unassigned