The rights shall be maintained for the composers of silently acted or chanted musical works prepared particularly for an audiovisual work. Article 79: The reward for co-authors of an audiovisual work shall be determined for each pattern of its utilization in the stage of concluding the work production contract or upon its utilization. Article 80: If the audiovisual work is exhibited or broadcasted by any mean to public in an open area in return for entrance charge, or publicly circulated through renting the medium for personal use, the co-authors whose rights are protected under the provisions herein and represented by the National Bureau shall have the right to obtain a reward from the utilizer or user commensurate to the revenues. If the work is exhibited or broadcasted by any mean without entrance charge, the due reward shall be arbitrarily calculated and the National Bureau of Copyrights and Neighboring Rights shall determine the percentages of proportional reward and arbitrary royalty level with regard to the utilization aspects mentioned in the previous two paragraphs. Article 81: Each user utilizing the audiovisual works as per terms provided for in Article 80 above shall inform the National Bureau on the revenues earned thereof in order to calculate the author's rights royalty payable thereon. The methods to implement this Article shall be determined by the regulation. Article 82: Producing the work copies in an audio-video recording publicly circulated for the purpose of renting for personal use shall be subject to permission from the author or his representative. Article 83: The provisions applicable to the audiovisual works utilization shall also be applicable to the similar broadcasting works in terms of characteristics. Article 84: The contract, under which the author assign to the publisher the right of reproducing several copies of the work as per conditions agreed upon and in return for a reward to publish and distribute them to public in favor of the publisher, shall be considered a publishing contract. The publishing contract shall include the literary or artistic work in the form of written printing or audio or audio-video recordings. Article 85: The author shall assign to the publisher, unless there is a contrary stipulation, the exclusive right to manufacture, reproduce, publish and distribute the work within the limits set forth in the contract. The publishing contract may include the assignment of the right of original form reproduction and translation. Article 86: The adaptation rights and the rights associated with other types of work utilization in its published original or translated form shall not entail an assignment in the publishing contract. Article 87: Each publishing contract that does not indicate the following matters shall be canceled: