The Intellectual Property Act establishes that, without prejudice to the copyright in the original work, derivative works such as adaptations and musical arrangements, among others, are also subject to intellectual property. The author of the original work retains the exclusive exercise of the transformation right (translation, adaptation and any other modification to the work that gives rise to a different work). Notwithstanding the intellectual property rights in the work resulting from the transformation, the exploitation of the results in any manner will correspond to the author of the latter (without prejudice to the right of the author of the pre-existing work to authorize it), for as long as the author's own rights on the work are protected. For this reason, in practice, a share-out of the revenue arising out of the exploitation of the new work is usually agreed between the author of the pre-existing work and its adapter.
On the other hand, if the adaptation is of a work in the public domain, the adapter would hold the corresponding rights. In other words, the passage of a work into the public domain is determined by the termination of the rights to exploit it.