(1) Where a notice, direction or other document is authorised or required by or under this Act or regulations made thereunder to be served on a person, it shall, unless otherwise specified in this Act, be addressed to him and shall be served on or given to him in one of the following ways -
(a) where it is addressed to him by name, by delivering it to him, or
(b) by leaving it at the address at which he ordinarily resides or, in a case in which an address for service has been furnished, at that address, or
(c) by sending it by ordinary prepaid post addressed to him at the address at which he ordinarily resides or, in a case in which an address for service has been furnished, at that address, or
(d) in the case of an officer or employee of an investment business firm whether authorised or otherwise, or a proposed investment business firm, by sending it to him by ordinary prepaid post addressed to him at the address of the principal office of that investment business firm or proposed inv
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