(1) An order in force under section 57R (including an order that has previously been varied on one or more occasions) is subject to such conditions as are specified in the order.
(2) Any such order has effect -
(a) if a period for the operation of the order is specified in the order - until the end of that period or, if the Appeals Tribunal decides the relevant appeal before the end of that period, until the decision of that Tribunal on the appeal takes effect, or
(b) if no period is so specified - until the decision of that Tribunal on the appeal takes effect.