Indiana Code Title 14. Natural and Cultural Resources § 14-30-3-32

Sec. 32. (a) The commission, the executive board, or employees or authorized representatives of the commission acting under this chapter may:

if necessary to investigate, examine, or survey the land or investigate suspected violations of the Indiana flood control laws.

(b) The commission must give twenty-one (21) days written notice to:

before exercising the right to enter land under this section.  The notice must state the purpose of the entry and that there is a right of appeal under this section.

(c) A person described in subsection (b)(1) through (b)(3) may, within the twenty-one (21) day notice period required by subsection (b), appeal the proposed entry under subsection (a) to the commission on the grounds that the proposed entry is not necessary.  If a person appeals under this subsection, the commission shall hold a hearing on the necessity of the entry before the right of entry is exercised.

(d) A person entering land under this section must use due care to avoid damage to crops or to fences, buildings, and other structures.

(e) Neither the commission, the executive board, nor employees or authorized representatives of the commission acting under this chapter commits criminal trespass under IC 35-43-2-2 by entering land described in subsection (a) for a purpose set forth in subsection (a).