California Code, Penal Code - PEN § 1289

After a defendant has been admitted to bail upon an indictment or information, the Court in which the charge is pending may, upon good cause shown, either increase or reduce the amount of bail. If the amount be increased, the Court may order the defendant to be committed to actual custody, unless he give bail in such increased amount. If application be made by the defendant for a reduction of the amount, notice of the application must be served upon the District Attorney.