22. (1) Where a trade mark is or be used with the consent of the registered owner, by other physical or juristic person, such used is deemed as may be the registered owner, provided that the relations or arrangements existing between the registered owner of the user ensure an effective control by the owner of the use of the trade mark with respect to the nature and quality of the goods and provided that the trade mark is not used in such a manner as to deceive the public. (2) Arrangements relating to the use of a registered trade mark by related persons must be recorded, at the instance of either part, within a period of six months from the date of the instrument and upon payment of the prescribed fee and the Registrar shall issue a certificate of registration under his hand in the prescribed from. The registration shall be as from the date of application and its duration shall not in any case exceed that of the mark itself. On failure of such recorded, the license shall be null and void. (3) (a) The Minister may, by order, provide that agreements concerning the use of trade mark by related persons, and amendments or renewals of such agreements, which involve the payment of royalties abroad shall require his approval, taking into account the needs of the country and its economic development. (b) The transfer of royalties abroad shall be subject to existing currency regulations. Renounciation of Registration 23. The registered owner of a trade mark may renounce the registration, either wholly or in part of the goods for which the mark is registered, in the prescribed manner and upon payment of a publication fee as prescribed. Cancellation of Registration 24. The cancellation of the registration of a trade mark shall be ordered by the Court on the request of any interested person or the Registrar: (a) If the mark was not entitled to registration under the provisions of this Act, provided that grounds which no longer existed at the time of the decision shall not be taken into account. (b) If the mark has been obtained by fraud. (c) If the mark has, without legitimate reason, not been used in the Republic of Sudan, after registration, during five consecutive years preceding the regarding the allegation of non-use. The burden of proof regarding the allegation of non-use of the mark or the use of it shall be