CA Civ Proc Code Section 437

(a)

The grounds for a motion to strike shall appear on the face of the challenged pleading or from any matter of which the court is required to take judicial notice.

(b)

Where the motion to strike is based on matter of which the court may take judicial notice pursuant to Section 452 or 453 of the Evidence Code, such matter shall be specified in the notice of motion, or in the supporting points and authorities, except as the court may otherwise permit.