“(a) Duties of first-named plaintiff or petitioner
Except as provided under rule 2.251 for electronic service, if more than two parties have appeared in a case and are represented by different counsel, the plaintiff or petitioner named first in the complaint or petition must:
(1) Maintain a current list of the parties and their addresses for service of notice on each party; and
(2) Furnish a copy of the list on request to any party or the court.
Except as provided under rule 2.251 for electronic service, each party must:
(1) Furnish the first-named plaintiff or petitioner with its current address for service of notice when it first appears in the action;
(2) Furnish the first-named plaintiff or petitioner with any changes in its address for service of notice; and
(3) If it serves an order, notice, or pleading on a party who has not yet appeared in the action, serve a copy of the list required under (a) at the same time as the order, notice, or pleading is served.”
(California Rule of Court 3.254.)