Idaho Admin. Code r. 20.01.01.055
Unless otherwise provided by statute or these rules, the officer designated by the agency to serve rules, notices, summonses, complaints, and orders issued by the agency may serve these documents by certified mail, return receipt requested, to a party's last known mailing address or by personal service. Unless otherwise provided by statute, these rules, order or notice, service of orders and notices is complete when a copy, properly addressed and stamped, is deposited in the United States mail or the Statehouse mail, if the party is a state employee or state agency. The officer designated by the agency to serve documents in a proceeding must serve all orders and notices in a proceeding on the representatives of each party designated pursuant to these rules for that proceeding and upon other persons designated by these rules or by the agency. (3-31-22)
Idaho Admin. Code r. 20.01.01.055