 retain copyright for their respective parts of the work.In this latter case, the copyright was to expire 70 years after the work was first lawfully disclosed, or 70 years after the creation of the work, if the work was undisclosed.Previously, the 70-year copyright term had applied only to works whose 50-year term had not yet expired in 2004, and thus the new Part IV of the Civil Code removed a number of works from the public domain, namely all those where the 50-year term had expired in the years 1994-2003