Ind. Code § 6-1.1-4-4.4
(b) If the assessor changes the underlying parcel characteristics, including age, grade, or condition, of a property, from the previous year's assessment date, the assessor shall document:
(2) the reason that each change was made.
In any appeal of the assessment, the assessor has the burden of proving that each change was valid.
As added by P.L.113-2010, SEC.13. Amended by P.L.245-2015, SEC.4.