Idaho Code § 55-1512
Except when a domestic corporation has been formed and designated in the declaration to serve as the management body to administer the project, at the time the declaration is recorded one (1) or more persons shall be designated to receive service of process in any action relating to the common areas and facilities. Such designation shall be filed with the county auditor in the county in which the project is located together with an acknowledgment in writing of acceptance of such designation by the person so designated. The person so designated shall be a resident of the state of Idaho, and service upon such person shall be the exclusive method of service in any action relating to the common areas and facilities. Upon termination of such person's capacity or authority to receive service, a new designation shall be made by the management body of the project, and such designation shall be filed with the county auditor in the county in which the project is located together with an acknowledgment in writing of acceptance of such designation by the person so designated. Upon failure to so designate a person to receive service of process and to file such designation and acceptance of such designation, service may be made upon the county auditor with like effect as though said service were made upon a person designated, and it shall be the duty of the county auditor to forward a copy of such summons served on him by registered mail to the management body of the project at the address or location last known, but no failure on the part of the county auditor to mail such copy of summons shall affect the validity of the service thereof. When a corporate organization is formed and designated as the management body, service of process on the corporation shall be as permitted by law, and the Idaho rules of civil procedure.
Idaho Code § 55-1512