(a) until the expiration of a period of: (i) three years commencing from the date of publication of a work in the field of technology or of a natural or physical science including mathematics; or (ii) seven years commencing from the date of publication of a work of fiction, poetry, drama or music or a book of art; or (iii) five years commencing from the date of publication of any other work; and (b) unless the Minister is first satisfied that: (i) there has never been a sale or other distribution, authorized by the owner of the reproduction right, of copies of the particular edition in Malawi to the general public in connexion with systematic instructional activities, at a price reasonably related to that charged in Malawi for comparable works, or that there has been no such sale or other distribution during the immediately preceding six months; (ii) the applicant either has requested from the owner of the right of reproduction for his authorization to reproduce the work and has been refused or, in spite of genuine efforts made by the applicant, he has been unable to locate the owner; (iii) the applicant, at the time of making the requests referred to in subparagraph (ii), sent a notice of his request either to the International Copyright Information Centre established by the United Nations Educational, Scientific and Cultural Organization, or a national or regional copyright information centre identified as such in a notification deposited with that organization or with the World Intellectual Property Organization by the state in which the publisher is believed to have his principal place of business; or (iv) where the applicant cannot locate the owner of the right of reproduction, the applicant has by registered mail sent copies of the application to the publisher whose name appears in the work and also to the centres specified in subparagraph (iii). (4) For the purpose of subsection (3)(b)(iii) the Society shall keep and maintain addresses of such centres for easy reference or contact by interested persons (5) A licence under this section shall not be granted in respect of any 25