81.— (1) A document referred to in section 80 may be served in a designated state by post.

(2) Subject to subsection (3), it may be transmitted to a designated state with a request for service otherwise than by post in accordance with the relevant international instrument.

(3) Where the person to be served is in a member state, service otherwise than by post may be requested only if—

(a) the address of the person is unknown or uncertain,

(b) it has not been possible to serve the document by post, or

(c) the person at whose request the document was issued has good reason for believing that service by post would not be effective or is inappropriate.

(4) Such a document may be served in a state other than a designated state in accordance with arrangements made by the Minister.