This license may only be non-exclusive. The rights deriving from an ex officio license may not be assigned, transferred or pledged. 70. Amendments to the clauses of the license, which have been requested either by the patent owner or the licensee, shall be decided upon and published according to the procedure laid down for the grant of said license. Where they relate to the amount of royalties, they shall be decided upon according to the procedure laid down for the original fixing of that remuneration. The withdrawal of the license requested by the patent owner for failure to comply with the obligations imposed on the licensee shall be effected in accordance with the provisions of the regulatory text referred to in Article 69. 71. The competent authority may serve formal notice on the owners of invention patents other than those referred to in Article 67 above to undertake the working thereof in such a way as to meet the needs of the national economy. 72. The decision to serve the formal notice provided for in Article 71 above must be substantiated and notified to the owner of the patent and, where applicable, the holders of the licenses entered in the National Register of Patents or their agents. 73. Where the formal notice provided for in Article 71 above has not been acceded to within the time period of one year beginning from the date of receipt of its notification and where the non-working or the qualitative or quantitative inadequacy of the working undertaken seriously prejudices economic development and the public interest, the patents to which the formal notice relates may be worked ex officio. Ex officio working shall be decreed by means of an administrative act. The time period of one year laid down in the first paragraph above may be extended by administrative act of the competent administrative authority where the patent owner provides proof of legitimate reasons which are compatible with the needs of the national economy. The extension referred to in the previous paragraph shall start on the date of expiry of said time period of one year. The decision to grant this extension shall be taken and notified according to the procedure and in the forms provided for by the decision to serve formal notice. 74. If, in accordance with the provisions of the first and second paragraphs of Article 73 above, recourse is had to the ex officio working of patents, the provisions of Articles 68 to 70 above shall apply. 75. The State may at any time obtain ex officio, in order to meet its defense requirements, a license to work an invention that is the subject of a patent application or a patent, whether the working is to be done by the State itself or on its behalf. The ex officio license shall be granted at the request of the authority responsible for national defense by means of an administrative act. This act shall fix the conditions for the license to the exclusion of those relating to the royalties to which it gives rise. The license shall enter into force on the date on which the request for the ex officio license is made. Failing amicable agreement between the patent owner and the authority concerned, the amount of the royalties shall be fixed by the Administrative Tribunal of Rabat.