Section 89. Any summons, notice, order or other document required to be served upon the Company may be served by

89. Any summons, notice, order or other document required to be served upon the Company may be served by leaving the same, or sending it through the post by a registered letter addressed to the Company, at their registered office; and any notice to the Registrar of joint stock Companies may be served by sending it to him through the post by a registered letter, or by delivering it to him or by leaving it for him at his office. Rules as to notices by letter.