Preliminary Authority Records in the LC/NAF (Section II: Additions and Changes to Authority Records)
The LC/NAF contains headings designated "preliminary" which may be identified by Level of Establishment fixed field 008/33 d; usually the 670 field will begin with a control number.
Although NACO participants do not generally create preliminary records, they are permitted to upgrade them to fully-established records, especially when they are making another change to the NAR.
See also: