(b) obligation of a license not to do anything which may affect the legality of the registration of an industrial design. 31. (1) Unless otherwise provided in a license, a licensor may grant additional licenses to other persons to use an industrial design. He may also use it himself. (2) If a license is absolute, the licensor shall not grant licenses to other persons to use the same industrial design or use it himself unless there is an express provision to that effect. 32. Unless otherwise provided in the license a licensee shall have the right to do all the things referred to in section 25 during the period of registration and the renewal of registration inside the Sudan, and anything related to applications in respect of the industrial design. 33. (1) Unless otherwise provided in the license, the license shall not be transferable to third parties, and the licensee shall not have a right to grant sub-licenses. (2) If the licensee is entitled by contract to transfer his license or to grant sub-licenses, sections 29 to 32 together with section 34 shall be applicable. 34. Without prejudice to the provisions of the Finance (Exchange Control Regulations) 1966, no license or amendment thereof may be lawfully renewed if that involves payment of fees abroad, unless the license, amendment or renewal is approved by the Minister and provided that the needs of the country and its economic development shall be considered. Part Ten: Renunciation and Nullity 35.(1) The registered owner of an industrial design renounces his registration by a written submission addressed to the Industrial Designs Office. (2) Renunciation may be limited to one manner of production or if the rules provide for classification for one variety or production, or if the application contains a number of industrial designs, the renunciation may be limited to a part of such industrial designs. (3) Renunciation shall be registered and published immediately by the Industrial Designs Office and shall not be valid unless registered. (4) If the Industrial Designs Office registers a license of an industrial design, the renunciation of such license shall not be registered except after the submission of a statement by the licensee accepting renunciation, unless the licensee expressly waives such right in the