CCP 472

§ 472. Amendment of pleading as of course; Special motion exception

(a) Any pleading may be amended once by the party of course, and without costs, at any time before the answer or demurrer is filed, or after demurrer and before the trial of the issue of law thereon, by filing the same as amended and serving a copy on the adverse party, and the time in which the adverse party must respond thereto shall be computed from the date of notice of the amendment.