The Licence to Use comes into effect from the date of payment of the relevant invoice(s). No use may be made of the Photographs before payment in full of the relevant invoice(s) without the Photographer's express permission. Any permission which may be given for prior use will automatically be revoked if full payment is not made by the due date or if the Agency is put into receivership or liquidation. The Licence only applies to the advertiser and product as stated on the front of the form and its benefit shall not be assigned to any third party without the Photographer's permission. Accordingly, even where any form of 'all media' Licence is granted, the photographer's permission must be obtained before any use of the Photographs for other purposes eg use in relation to another product or sublicensing through a photolibrary. Permission to use the Photographs for purposes outside the terms of the Licence will normally be granted upon payment of a further fee, which must be mutually agreed (and paid in full) before such further use. Unless otherwise agreed in writing, all further Licences in respect of the Photographs will be subject to these terms and conditions.