RECOMMENDATION ITU-R TF.460-6* - Standard-frequency and time-signal emissions
ANNEX 1 - Time scales
A Universal time (UT)
B International atomic time (TAI)
C Coordinated universal time (UTC)
D DUT1
1 Tolerances
2 Leap-seconds
3 Value of DUT1
E DTAI
ANNEX 2 - Code for the transmission of DUT1
ANNEX 3 - Dating of events in the vicinity of a leap-second