s 6 Effecting Scottish citation etc. otherwise than by post
(1) A citation or document to which section 5 applies may, instead of being effected or served by post, be effected against or served on a person outside the United Kingdom in accordance with arrangements made by the Lord Advocate. (2) But where the person is in a participating country, the citation may be effected or document served in accordance with those arrangements only if one of the following conditions is met. (3) The conditions are— (a) that the correct address of the person is unknown, (b) that it has not been possible to effect the citation or serve the document by post, (c) that there are good reasons for thinking that citation or (as the case may be) service by post will not be effective or is inappropriate.