Iowa Code § 902.8: Minimum sentence — habitual offender.

An habitual offender is any person convicted of a class “C” or a class “D” felony, who has twice before been convicted of any felony in a court of this or any other state, or of the United States. An offense is a felony if, by the law under which the person is convicted, it is so classified at the time of the person’s conviction. A person sentenced as an habitual offender shall not be eligible for parole until the person has served the minimum sentence of confinement of three years.