7(1)Where a work order has been made in respect of any sum—
(a)on payment of the whole of the sum to any person authorised to receive it, the work order ceases to have effect, and
(b)on payment of part of the sum to any such person, the number of hours specified in the order is to be taken to be reduced by a proportion corresponding to that which the part paid bears to the whole of the relevant sum.
(2)In calculating any reduction required by sub-paragraph (1)(b), any fraction of an hour is to be disregarded.