(1) This section applies if--
(a) because of section 12, 13, 18 or 19, a purported dispute referral can not be made to or be investigated by the energy ombudsman; or
(b) under section 22, the energy ombudsman refuses to carry out or to continue an investigation.
(2) The energy ombudsman must, as soon as reasonably practicable, notify the referrer that the purported dispute referral, or the dispute referral the subject of the former investigation, will not be investigated, or continue to be investigated, and why.
(3) The notice may be oral or written.