20.1 A court may receive the evidence of an expert that provides it with information that is likely to be outside its experience and knowledge. Expert evidence can only be given by a person with the requisite qualifications, knowledge and experience in the relevant field of expertise. An expert witness has an overriding duty to assist the court and should provide it with independent evidence in the form of objective unbiased opinion on matters within his or her expertise. In the interests of justice, a prosecutor should ensure that these requirements are always met.
20.2 Prosecutors should have regard to Guidelines for Expert Witnesses of the Prosecutions Division.