008/18-27 Undefined (Variable Control Field - Fixed-Length Data Element)
Character position definition and scope:
These ten character positions are undefined; each may contain a blank ( # )meaning Undefined or a fill character ( | ) meaning No attempt to code.
National Level Requirement for character positions 008/18-27 is Optional.
For information on other 008 character positions, see:
008 Fixed-Length Data Elements
See also: