Sec. 5. (a) Subject to this article, the rules adopted by the department of local government finance are the basis for determining the true tax value of tangible property.
(b) Assessing officials shall:
(1) comply with the rules, appraisal manuals, bulletins, and directives adopted by the department of local government finance;
(2) use the property tax forms, property tax returns, and notice forms prescribed by the department; and
(3) collect and record the data required by the department.
(c) In assessing tangible property, the assessing officials may consider factors in addition to those prescribed by the department of local government finance if the use of the additional factors is first approved by the department. Each assessing official shall indicate on the official's records for each individual assessment whether:
(1) only the factors contained in the department's rules, forms, and returns have been considered; or
(2) factors in addition to those contained in the department's rules, forms, and returns have been considered.