(e)a period of six months in the case of an application for the reproduction and publication of any work of natural science, physical science, mathematics or technology, or a period of three months in the case of an application for the reproduction and publication of any other work, has elapsed from the date of making the request under clause (a), or where a copy of the request has been sent under clause (b), from the date of sending of a copy, and a reproduction of the work has not been published by the owner of the copyright in the work or any person authorised by him within the said period of six months or, three months, as the case may be;