Chapter 2. Province Of Court And Jury of California Evidence Code >> Division 3. >> Chapter 2.

(a) All questions of law (including but not limited to questions concerning the construction of statutes and other writings, the admissibility of evidence, and other rules of evidence) are to be decided by the court. Determination of issues of fact preliminary to the admission of evidence are to be decided by the court as provided in Article 2 (commencing with Section 400) of Chapter 4.
  (b) Determination of the law of an organization of nations or of the law of a foreign nation or a public entity in a foreign nation is a question of law to be determined in the manner provided in Division 4 (commencing with Section 450).

If the law of an organization of nations, a foreign nation or a state other than this state, or a public entity in a foreign nation or a state other than this state, is applicable and such law cannot be determined, the court may, as the ends of justice require, either:
  (a) Apply the law of this state if the court can do so consistently with the Constitution of the United States and the Constitution of this state; or
  (b) Dismiss the action without prejudice or, in the case of a reviewing court, remand the case to the trial court with directions to dismiss the action without prejudice.

Except as otherwise provided by law, where the trial is by jury:
  (a) All questions of fact are to be decided by the jury.
  (b) Subject to the control of the court, the jury is to determine the effect and value of the evidence addressed to it, including the credibility of witnesses and hearsay declarants.