If neither the township clerk nor any deputy township clerk shall be available to perform any necessary functions in connection with registrations, nominations or elections during the usual or required times for performing such functions, the township board shall appoint some qualified person who is a registered elector of the township to perform such functions until such time as the clerk or a deputy resume their duties. Any such person so appointed shall have all of the powers and authority of a deputy appointed by the clerk pertaining to registrations, nominations and elections.