Title 48, Chapter 5, Section 342
(a) The commissioner shall carefully examine the tax digests of the
counties filed in his office. Each digest for a county in a digest
review year shall be examined for the purpose of determining if the
valuations of property for taxation purposes are reasonably uniform
and equalized between counties and within counties.
(b) For any digest in any digest review year where the digest for
the preceding digest review year was conditionally approved by the
commissioner, the commissioner shall also carefully examine the
digest to determine if it satisfactorily corrects the deficiencies
that resulted in the digest for the preceding digest review year
being conditionally approved.
(c) For each year, including each year that is not a digest review
year for the county, the commissioner shall utilize the overall
assessment ratio for the county as provided by the state auditor.
(d) It shall be the further duty of the commissioner to examine the
itemizations of exempt properties appearing on the digest and, if in
the judgment of the commissioner any properties appearing on the
digest are subject to taxation, to so advise the board of tax
assessors of the counties concerned with an explanation of his
reasons for believing the property is subject to taxation.