48. The protection of related rights shall not affect any of the rights in respect of original and derivative works protected under this Law. Any interpretation of any of the rights granted under this Chapter shall not affect the rights of the original author. Chapter VIII Terms of Protection 49. The term of protection granted under this Law to the economic rights of the author, shall be the life of the author and 50 years after his death, to be computed from the end of the year in which the death has occurred. 50. In the case of a work of joint authorship, the term of protection shall be the life of the joint authors and 50 years after the death of the last joint author, to be computed from the end of the year in which the death has occurred. Should one of the authors die without leaving heirs, his share shall pass to the co-authors or to their heirs, unless stated otherwise. 51. In the case of collective and audiovisual works, the term of protection shall be 50 years to be computed from the end of the year in which the work has been made available to the public or, failing such event, 50 years from the making of such work, to be computed from the end of the year in which the work has been completed. 52. In the case of anonymous or pseudonymous works, the term of protection shall expire 50 years after the work has been lawfully made available to the public. However, if the pseudonym adopted by the author leaves no doubt as to his identity, or if the identity of the author of an anonymous or pseudonymous work is disclosed before the expiration of the 50-year period starting from the end of the year in which the work was lawfully made available to the public, the provisions of Article 49 of this Law shall apply. In the case of posthumous works or works published in the name of a legal person, the term of protection shall be 50 years to be computed from the end of the year in which the work was published. 53. All moral rights of authors or performers shall enjoy perpetual protection that shall not be subject to prescription. They shall be transmitted to third parties by testamentary disposition or under inheritance laws. 54. All economic related rights of performers shall enjoy protection for a period of 50 years to be computed from the end of the year in which the performance has been carried out. 55. The term of protection granted to producers of sound recordings shall be 50 years, to be computed from the end of the year in which the first fixation of sound on tangible material has taken place. 56. The term of protection granted to broadcasting organizations shall be 50 years, to be computed from the end of the year in which the broadcasting of their programs has taken place. 57. The term of protection granted to publishing houses shall be 50 years, to be computed from the end of the year in which the first publication has taken place. Chapter IX Collective Management Associations and Companies 58. Authors and holders of related rights or their universal or particular successors may assign the management of their rights and the collection, in whole or in part, of royalties due to civil associations or companies formed among them. 59. Assignment shall be made by way of a written power of attorney drafted before a notary public and explicitly stating all the rights the management of which are assigned to the association or company.