1103.4 (G) Limitation of Claim
As discussed in Section 1103.2, all of the works in a unit of publication must be physically bundled together by the claimant in a single, integrated unit, they must be first published on the same date, and the claimant for all of those works must be the same person or organization.
A claimant may use the unit of publication option only if that party packaged or bundled the unit as a whole, or if that party caused the unit to be packaged or bundled together. Moreover, the unit of publication option cannot be used to register any of the works in the unit that have been previously published or any works that are not owned by the copyright claimant (although such works may be registered separately). If the unit contains previously published material or third party material, the applicant should exclude that material from the claim using the procedure described in Chapter 600, Section 621.8 (B). The excluded works must be registered separately as individual works.
If the unit contains material that has been previously registered with the Copyright Office, the applicant should exclude that material from the claim using the procedure described in Chapter 600, Section 621.8 (F).