2129 Joint Works and Other Unitary Works
Generally, when a work is unitary in nature the renewal claim should include all of the authorship claimed in the original registration record or first published in the work, unless any portion of the work is preexisting or separately owned for the renewal term. This principle is in contrast with renewal registration of works that are collective in nature, where the renewal claim generally must be limited to the compilation or editorial authorship contributed by the individual or proprietary author. See Section 2126.