The first rule in zone_rules is applied to zones which have no rules associated with them (where num_rules=0). This happens to have no effect with the supplied zones.c file, as the first rule (AN) has an offset of zero.
The first rule in zone_rules is applied to zones which have no rules associated with them (where num_rules=0).
This happens to have no effect with the supplied zones.c file, as the first rule (AN) has an offset of zero.