18Suspension of use of harbours.N.I.
(1)Where the Ministry is satisfied that a local harbour authority should be authorised to suspend the use of a harbour (or any part of a harbour) vested in it for a period not exceeding one year in order—
(a)to execute works which it would not otherwise be possible to execute;
(b)to prevent injury or damage to life or to property;
the Ministry may make an order suspending the use of that harbour or of such part of the harbour as is specified in the order, by such persons and for such purposes, as are specified in the order.
(2)An order made under subsection (1) may be renewed for successive periods not exceeding one year.