Article 7 Service on other individuals
Where under these Rules any document is to be served on an individual other than a person to whom proceedings relate, the registrar or a person mentioned in rule 6, it may be served—
(a)
on the individual personally;
(b)
if he is subject to service law, by post in a letter addressed to him at his unit;
(c)
if he is not subject to service law—
(i)
by leaving it at his usual or last known place of abode; or
(ii)
by post in a letter addressed to his usual or last known place of abode.