Prescribed mode of service
6.—(1)  In these Regulations, a person (X) serves a document on another person (Y) by the prescribed mode of service if —
(a)X sends the document to Y’s last email address using the electronic system;
(b)where X is for any reason unable to send the document in the manner described in sub‑paragraph (a) — X sends the document to Y’s last email address using any other means;
(c)where X is for any reason unable to send the document in the manner described in sub‑paragraphs (a) and (b), and either —
(i)Y has an account for the use of an internet‑based messaging service, and that service provides a mechanism for Y to receive electronic communications in that account; or
(ii)Y is the owner or operator of an Internet website, a blog or a page on any social media or social networking Internet website, and that Internet website, blog or page on that social media or social networking Internet website provides a mechanism for Y to receive electronic communications on that Internet website, blog or page on that social media or social networking Internet website,
and the mechanism in sub‑paragraph (i) or (ii) is the means or one of the means by which X corresponds with Y on matters concerning the specified contract in question — X sends an electronic communication of that document to Y using that mechanism;
(d)where X is for any reason unable to send the document in the manner described in sub‑paragraphs (a), (b) and (c) —
(i)X sends the document —
(A)to an email address, place of business, registered office, or other place or platform for receiving communications; and
(B)by a mode of service,
specified in the specified contract in question for serving any notice under that contract; and
(ii)X sends the document to Y’s last postal address by prepaid registered post, if this is not a mode of service mentioned in sub‑paragraph (i); or
(e)where X is for any reason unable to send the document in the manner described in sub‑paragraphs (a) to (d) — X sends the document to Y’s last postal address by prepaid registered post.
(2)  In paragraph (1) —
“document” includes a form;
“last email address” means —
(a)Y’s designated email address; or
(b)if Y has no designated email address — an email address by which X corresponds with Y on matters concerning the specified contract in question, or (if there is no such email address) an email address which Y represents to X as the email address to which communications to Y may be sent;
“last postal address” means —
(a)Y’s designated postal address; or
(b)if Y has no designated postal address — Y’s ordinary address.