Ind. Code § 6-1.1-34-11

Sec. 11. Information which the department of local government finance has obtained from the federal government or a public agency under section 9(3) of this chapter is subject to the provider's rules and regulations, if any, which concern the confidential nature of the information. In addition, the information compiled by the department under this chapter is confidential until publication of the assessment ratio and then loses its confidential character only to the extent that it is used in determining the ratio.