(e) the use of objects on board aircraft, land vehicles or waterborne vessels of member countries of the International Union for the Protection of Industrial Property that temporarily or accidentally penetrate the airspace, territory or territorial waters of Morocco; (f) acts performed by anyone who, in good faith, on the date on which the application is filed or, where a priority has been claimed, on the date of priority of the application on the basis of which the patent has been granted on the territory of Morocco, used the invention or made effective and serious preparations to use it, insofar as these acts do not differ, in their nature or purpose, from the actual or envisaged prior use. The right of the earlier user may only be transferred with the company to which he is attached. SECTION II TRANSFER AND LOSS OF RIGHTS Subsection I General provisions 56. The rights deriving from a patent application or a patent may be transferred either in full or in part. The rights may be the subject, either in full or in part, of a license for exclusive or nonexclusive use, as well as an encumbrance. The rights conferred by the patent application or patent may be asserted against a licensee who infringes one of the limits of the license imposed in accordance with the previous paragraph. Subject to the provisions of Article 19 above, the transfer of the rights referred to in the first paragraph of this Article shall not infringe the rights acquired by third parties prior to the date of transfer. Acts comprising transfer or a license, as referred to in the first two paragraphs above, shall be recorded in writing, on pain of invalidation. 57. Unless stipulated otherwise in the contract, the licensee shall benefit as of right from such certificates of addition deriving from the patent forming the subject matter of the license, as are granted after the date on which the contract for the license to work is signed, to the owner of the patent or his successors in title. Conversely, the owner of the patent or his successors in title shall benefit from any certificates of addition deriving from the patent that are granted subsequently to the licensee starting from the date on which the contract for the license to work is signed. 58. To be binding on third parties, any acts which transfer, amend or affect the rights deriving from a patent application or a patent must be entered in a register known as the “National Register of Patents”, which shall be kept by the entity responsible for industrial property. However, an act shall be binding before such entry on third parties who have acquired rights after the date of the act, with notice of the act when the rights were acquired. Acts amending the ownership of the patent application or patent or the enjoyment of the rights deriving therefrom, such as assignment, licensing, the making or transfer of a pledge or the surrender thereof, or seizure and the validation or lifting of seizure, shall be entered at the request of one of the parties to the act.