ยง 1019. Substitution of public officers. If a person made a party in his capacity as public officer dies or otherwise ceases to hold office, the action may be continued by or against his successor if it is shown to the court that there is need for so continuing it. Before a substitution is made his successor and, unless the court otherwise orders, the party shall be given reasonable notice of the motion and accorded an opportunity to object. When, in accordance with section 1023, an officer is described by his official title and his name is not added, no substitution is necessary.