11 (12) The non-voluntary license may be terminated or its terms amended by the Patent Office, or upon a request from any interested party, if within two years after the grant of the nonvoluntary license, the licensee fails to exploit the subject matter of the license or to meet his obligations as prescribed by the license. Article 25 Patents may be expropriated by decision of the competent Minister - subject to the approval of the ministerial committee referred to in Article 23 - on grounds relating to national defence and in cases of emergency which the grant of a non-voluntary license is insufficient to counter. The expropriation may be limited to the right of exploitation only to satisfy the needs of the State. In all cases, the expropriation shall be against a fair compensation, to be assessed by the committee provided for in Article 36 and on the basis of the economic value of the patent at the time the expropriation decision is made. The expropriation decision shall be published in the Patent Gazette. The decision of the expropriation and that of the compensation assessment committee may be appealed before the Administrative Court, within 60 days from the date of notification of the decision to the interested party, by means of a registered letter with acknowledgement of receipt. The Court shall decide on such an appeal expeditiously. Article 26 The rights conferred by a patent shall lapse and fall into the public domain under the following conditions: (1) Expiration of the protection period according to Article 9. (2) Relinquishment by the patent holder of his rights without prejudice to the rights of third parties. (3) Final decision taken revoking the patent. (4) Failure to pay, within one year from the due date, the annual fees or the overdue penalty of 7% of the annual fees, after notification of payment according to the procedure prescribed by the Regulations. (5) Where the invention is not exploited in Egypt within two years following the grant of a nonvoluntary license and upon a request by any interested party submitted to the Patent Office. (6) Abuse by the patent owner of his rights, where the non-voluntary license is insufficient to remedy that abuse.