An order or document required or permitted to be served on a person under this Order may be served on him:
(a) personally;
(b) by delivering a copy at his usual or last known place of residence or business to a person who apparently resides or is employed there and has apparently attained the age of 16 years; or
(c) by sending a copy to him at his usual or last known place of residence or business by registered post.
Order 73 Charging orders and stop orders and notices