You may have noticed the term “propagated exclusion” on one or more of your references. If you deliver a reference to YouTube that we believe is identical to a reference you have provided on that asset in the past, we may automatically copy exclusions (reference overlaps and manually created exclusions) from the existing reference onto the new, duplicate reference. In addition, any exclusions on the new, duplicate reference may be copied onto the existing reference. This would only occur if the duplicate references are on the same asset. These copied exclusions are termed "propagated exclusions".