(1) This section applies only in a criminal proceeding and only if an oral admission was made by a defendant to an investigating official in response to a question put or a representation made by the official.
(2) A document prepared by or on behalf of the official is not admissible to prove the contents of the question, representation or response unless the defendant has acknowledged that the document is a true record of the question, representation or response.
(3) The acknowledgement must be made by signing, initialling or otherwise marking the document.
(4) In this section:
"document" does not include:(a) a sound recording, or a transcript of a sound recording, or(b) a recording of visual images and sounds, or a transcript of the sounds so recorded.