This object specifies the timeproperties dataset value of
current UTC offset.
In PTP systems whose epoch is the PTP epoch, the value of
timePropertiesDS.currentUtcOffset is the offset
between TAI and UTC; otherwise the value has no meaning. The
value shall be in units of seconds.
The initialization value shall be selected as follows:
a) If the timePropertiesDS.ptpTimescale (see 8.2.4.8) is TRUE,
the value is the value obtained from a
primary reference if the value is known at the time of
initialization, else.
b) The value shall be the current number of leap seconds (7.2.3)
when the node is designed.