Ind. Code § 34-13-3.5-4

Sec. 4. An individual or entity may not initiate a civil action or an administrative proceeding against a public school, unless the individual or entity submits a written notice to the public school and the governing body or the equivalent authority for a charter school that notifies the public school and the governing body or the equivalent authority for a charter school of the alleged violation of law and indicates a proposed remedy.