Form subdivisions provided under individual headings in the Subject Authority File are authorized for use when applicable. Free-floating form subdivisions may be combined with appropriate main headings according to established procedures. The same form subdivision is added to all subject headings assigned to a particular record, except when the heading represents a part of the work that is in a different form or when the subdivision in question is not authorized under the particular heading.

25.2 Reference

See also:

25.0 Use of subdivisions