Section 722 Of Article 1. Expert Witnesses Generally From California Evidence Code >> Division 6. >> Chapter 3. >> Article 1.
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. (a) The fact of the appointment of an expert witness by the
court may be revealed to the trier of fact.
(b) The compensation and expenses paid or to be paid to an expert
witness by the party calling him is a proper subject of inquiry by
any adverse party as relevant to the credibility of the witness and
the weight of his testimony.