California Evidence Code Section 803

CA Ev Code § 803 (2017)  

The court may, and upon objection shall, exclude testimony in the form of an opinion that is based in whole or in significant part on matter that is not a proper basis for such an opinion. In such case, the witness may, if there remains a proper basis for his opinion, then state his opinion after excluding from consideration the matter determined to be improper.

(Enacted by Stats. 1965, Ch. 299.)

Last modified: October 25, 2018