15. The copyright holder shall have the exclusive right to exploit the work commercially and, accordingly, shall have the right to authorize or prohibit the following: - any copying, printing, recording and reproduction of the work in any manner or form including photography, cinematography, sound or visual recordings of any kind or any other form; - any translation, adaptation, alteration, transformation, summarizing, reworking of the work or rearrangement of the music; - the sale, distribution or rental of the work; - the importation of copies of the work manufactured abroad; - the public performance of the work; - communication to the public of the work by wire or wireless means, whether through hertzian waves or the like or through coded or uncoded satellites, including the rebroadcast of normal television or radio broadcasts or satellite transmissions by any means of diffusion of sounds and images. 16. The economic rights of the author shall be considered as movable rights and may be transferred in whole or in part. 17. Any contract for the exploitation or assignment of economic rights shall, whatever its subject, be drawn up in writing, otherwise it shall entail nullity of the contract. It shall set out in detail the rights covered by the contract and indicate the time and location. The contract shall also require that the author gets a percentage of the exploitation revenues and assignment proceeds. If such a contract does not set a time limit, it shall be valid for 10 years only from the date of signature of the contract. 18. The assignment in whole of future works shall be considered as void. 19. The assignment by the author of any of his rights must be limited in all cases to that right only and copyright contracts shall be construed in a restrictive manner. 20. The author and composer of a song shall have equal rights in that work, unless agreed otherwise. 21. Independently of the rights provided for in the previous Article and even after the assignment of the said rights, the author shall enjoy the following moral rights: - the right to disclose the work and to determine the way and method of such disclosure; - the right to claim authorship of the work and to have his name mentioned on every copy of the work each time the work is used in public; - the right to use a pseudonym or to remain anonymous; - the right to object to any distortion, mutilation or modification of the work which would be prejudicial to his honor, reputation, fame or artistic, literary or scientific position; - the right to rescind contracts for the assignment of economic rights even after their publication if rescission is necessary to safeguard his person and reputation or is due to a change in his beliefs or in the circumstances, provided that third parties are compensated for damage resulting from such rescission. 22. It shall not be permitted to assign or attach the moral rights of the author but the said rights may be transmitted by testamentary disposition or inheritance laws.