Cal. Code Civ. Proc. § 589 : CALIFORNIA CODE OF CIVIL PROCEDURE — OF CIVIL ACTIONS — OF THE TRIAL AND JUDGMENT IN CIVIL ACTIONS — ISSUES-THE MODE OF TRIAL AND POSTPONEMENTS — Issue of law
An issue of law arises:
(a) Upon a demurrer to the complaint, cross-complaint, or answer, or to some part thereof.
(b) Upon a motion to strike made pursuant to Section
435,
436, or
473.