Iowa Admin. Code r. 571-37.30
Any power unit mounted or carried aboard a vessel, while not being used or operated as a source of propulsion, shall be lawful on artificial lakes, so long as the auxiliary power unit being used or operated as a source of propulsion is within the lawful horsepower limitation established for that lake.
[ARC 9219C, IAB 5/14/25, effective 6/18/25]