A warrant not paid upon presentation for want of funds bears interest on unpaid balances at the rate in effect at the time the warrant is first presented for payment, as established by rule pursuant to section 74A.6, subsection 2. This section does not apply to an obligation which by law bears interest from the time it is issued.
Iowa Code § 74A.2
Referred to in §74.2, 74A.6, 273.3, 285.10