45. The Deputy Commissioner shall add to the amount appearing in the said certificate all sums which have been paid or have become payable in respect of the said works and repairs, whether as compensation, costs and expenses under, and incidental to, any proceedings taken or directed to be taken under any provision of this Act, and shall then make an order specifying the total sum found payable and in respect of works done under section 14 or section 19, the persons, by whom, or in respect of the other works, the lands in respect of which the same is payable. If the order is made in respect of work done under section 14 or section 19, the same shall forthwith be served upon the persons liable to pay; otherwise the Deputy Commissioner shall proceed according to the provisions hereinafter made. Interest may be charged upon any sum paid as compensation from the date of payment thereof at five per centum, or at such other rate not exceeding five per centum, per annum, as the Government or the Authority may from time to time determine.