Article(23) If the author's heirs or successors do not exercise the rights provided for in Articles 18 and 19 of this law, and the Minister of Information & Culture deemed that the public interest dictates publishing the work, he may request from them through a registered letter to publish it. If sixty days elapse after the date of request, and the author's successors did not express their readiness for publication or expressed their abstention from doing it, the Minister may exercise the said rights after obtaining an order from the head of the Court of First Instance within whose jurisdiction the headquarters of the Ministry of Information & Culture is located. Article(24) In cases where the protection period is calculated to start as from the date of publication of the work, according to the provisions of this law, the date of first publication of the work shall be considered as the date for calculating the period irrespective of republication, unless the author makes upon re-publication basic modifications that it can be considered a new work of art. If the work of art consists of many parts or volumes published separately and at different intervals, each part or volume shall be considered an independent work of art for the calculation of periods of protection Chapter Two Provisions for Certain Works Article(25) If more than one person takes part in compiling a work of art, so that it is not possible to separate the share of each one of them in the joint work, then all of them shall be regarded as equal owners of the work, unless otherwise agreed. In this case, the copyright cannot be exercised without the agreement of all the participating authors. If a dispute arises among them, it shall be settled before the Court of First Instance. Without prejudice to Articles (27), (29), (30), (32), (33) and (34), each one of the participating authors shall have the right to file a lawsuit if any copyright infringement takes place. Article (26) If more than one person takes part in compiling a work of art in such a way to make it possible to separate the share of each one of them in the joint work , then each one of them shall have the right to utilize his share separately, provided that it is not detrimental to the utilization of the joint work, unless otherwise agreed. Article(27) A collective work is a work in which a group of persons share willingly in making it