363 INTELLECTUAL PROPERTY LAW The law regulates two different types of licenses, those being exclusive or non-exclusive license. A license is non-exclusive if it does not prohibit the holder of the economic right to grant the same license to others and is exclusive if it is granted to only one person. In the case of an exclusive license, unless otherwise determined, even the author (or the economic right holder) may not exercise such right. Unless to the contrary can be deduced from the law or agreement, all licenses are deemed to be non-exclusive. The provisions on usufructuary leases will apply to non-exclusive licenses, and those on usufruct leases shall apply to exclusive licenses (IAWC Article 56). The license to exercise an economic right is granted through a written license agreement in which all rights to license are explicitly specified. In the same manner, and with respect to assignment agreements, written form is a validity condition. Any vague expressions regarding licensed economic rights will be deemed invalid. The license right may also be assigned on a limited or unlimited basis with respect to location, duration and scope. Additionally, the license may be granted with or without the requirement to pay any consideration. For instance, an exclusive license on the right to reproduce the musical work of a symphony may be granted to a publishing house, a non-exclusive license on the right to perform the symphony may be granted to a concert organizer, and non-exclusive licenses on the right to communicate the work to the public may be granted to two different TV channels.4 Granting an exclusive license on an economic right does not create an obstacle for the assignment of such economic right, because the licensed economic right remains within the assets of the right holder; however, the rights of the exclusive licensee will be protected against the new right holder.5 The provision prohibiting the assignment of the assigned economic right by the right holder to third parties without obtaining the written consent of the author (or his/her heirs) also applies to license agreements. Accordingly, the exclusive or non-exclusive licensee may not grant a license to third parties without obtaining the written consent of 4 Tekinalp: p. 232. 5 Karaha/ Suluk/ Saraç/ Nal: p. 117.
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