s 51 Start of period for which security is required
51.—(1) If any person subject to an order under section 41 or 50 is, at the time the order is made, sentenced to or undergoing imprisonment, the period for which the security is required will begin at the end of that sentence.(2) In all other cases, the period will begin on the date of the order. —(1) If any person subject to an order under section 41 or 50 is, at the time the order is made, sentenced to or undergoing imprisonment, the period for which the security is required will begin at the end of that sentence. (2) In all other cases, the period will begin on the date of the order.