On the conclusion of the period specified in clause 4 or on the termination of this agreement under clause 26 or clause 29, as the case may be, (a) the contractor shall be allowed a further period of three years for delivering at a measuring station and removing therefrom after payment of royalty on or otherwise dealing as provided in clause 20 with any timber bearing his authorised hammer marks the extraction of which has in accordance with the terms of this agreement been completed before the date such conclusion or termination and on the expiry of such further period he shall cease to have any rights whatever in timber not yet so delivered: Provided that the rates of royalty payable under this clause shall be the same as the rates fixed for the concession area under any new agreement whether with the present contractor or with other parties subsequent to this agreement or in the event of no new agreement being entered into at the rates of royalty set out in clause 20 of this agreement; (b) the contractor shall be given such reasonable time as in the opinion of the Government may be necessary to allow him to dispose of such of his buildings, mills, railways or other structures erected for the purposes of his business under this agreement as are standing on land at the disposal of the Government." Under clause 29 the Contractor was given the rights to terminate the agreement at any time by giving two years notice in writing.