Service of documents
18.  Except insofar as these By-laws otherwise expressly provide, any document required by these By-laws to be served on any person may be served on the person —
(a)by delivering the document to the person or to some adult member or employee of his family or household at the usual or last known place of residence;
(b)by leaving the document at his usual or last known place of residence or place of business in an envelope addressed to the person;
(c)by sending the document by registered post to the person at his usual or last known place of residence or place of business; or
(d)in the case of an incorporated company, a partnership or a body of persons —
(i)by delivering the document to the secretary or other like officer of the company, partnership or body of persons at its registered office or principal place of business; or
(ii)by sending the document by registered post addressed to the company, partnership or body of persons at its registered office or principal place of business.