Section 23A

In any proceedings for an offence under this Act, no expert evidence shall be received in evidence unless, within a period ending ten clear days before the trial, the person charged with the offence has served on the prosecution notice in writing that he intends to adduce expert evidence, and shall disclose in the notice the name of the expert and the nature of the expert evidence; and shall also furnish a copy of any document that the expert proposes to adduce at the hearing.