1.4F5. Optional addition.

Option Decision:

Apply the optional rule to materials other than books and printed serials whenever the copyright date of the item is different from the date of publication etc. (For books and printed serials, do not add a copyright date after the publication date.)

If a copyright date is being recorded, transcribe copyright dates other than a phonogram copyright date preceded by a lowercase "c"; transcribe the phonogram copyright date preceded by a lowercase "p."

See also:

1.4F. Date of publication, distribution, etc.