Cal. Evidence Code § 603 : California Evidence Code — Burden Of Proof; Burden Of Producing Evidence; Presumptions And Inferences — Presumptions And Inferences — General — Nature of presumption affecting burden of producing evidence Date: 31 Aug 2016 TEXT PDF Current through the 2016 Legislative Session A presumption affecting the burden of producing evidence is a presumption established to implement no public policy other than to facilitate the determination of the particular action in which the presumption is applied. Ca. Evid. Code § 603