18.—(1) In this Part, references to a request for a document are to a request—
(a)which is properly addressed to a person who usually provides or is likely to provide the type of document requested; and
(b)which—
(i)is made in such form;
(ii)contains all such information; and
(iii)is accompanied by such payment or an undertaking to make such payment,
as is usually necessary to obtain a document of the type requested.
(2) In this Part, proof of a request for a document means a written statement of the following matters—
(a)which of the required documents has been requested;
(b)the date that a request for the document is delivered in accordance with regulation 19;
(c)the name of the person to whom the request has been addressed;
(d)the date the responsible person believes the document is likely to become available; and
(e)confirmation that the request complies with paragraph (1).