X53 Subfield: $z - Table identification - Table number

Subfield $z contains the identification of the number of the table to which the classification number belongs. The identification of the table by which a classification number or span is further subarranged is contained in field 761 (Add or Divide Like Instructions) . Subfield $z is not repeatable ; it is input before the first element of the classification number in the first subfield $a.