The value of tmnxSubApCrSignChangeOECounters specifies the egress
counter Ids in the counter-group defined by tmnxSubApCrSignChangeOCntr
to be taken as reference to which the significant change defined in
tmnxSubApCrSignChangeDelta applies.
A non-zero value of this object is only allowed if the object
tmnxSubApCrSignChangeOCntr has a non-zero value.