Iowa Code
Chapter 437B - TAXES ON RATE-REGULATED WATER UTILITIES
Section 437B.16 - Tax exemptions.

437B.16 Tax exemptions.
Except as provided in section 437B.12, all property tax exemptions in the Code do not apply to property subject to the statewide property tax unless such exemptions expressly refer to the statewide property tax, except that if property was exempt from property tax on January 1, 2013, such exemption shall continue until the exemption expires, is phased out, or is repealed. The property of a taxpayer who does not owe any replacement tax is exempt from the statewide property tax for the coinciding assessment year.
2013 Acts, ch 94, §25, 35, 36