043 Field (Optional) (Section I: New Authority Records)
The 043 field contains geographic area codes for geographic areas associated with the 1XX heading in an established heading record or a subdivision record. NACO participants may, at their discretion, supply the 043 in name authority records, following the guidelines in the MARC Code List for Geographic Areas.
If using a 043, do not add subfields $6 and $8.
See also: