4.—(1) A regulated company shall have mentioned on all relevant documents the fact that it is a company controlled, or, as the case may be, influenced, by a local authority, within the meaning of Part V; and naming the relevant authority or authorities.
(2) In this article “relevant documents” means business letters, notices and other documents of the company, being of any kind mentioned in paragraphs (a) to (d) of section 349(1) of the 1985 Act.