Sec. 9. (a) A person may not access a low head dam or wade, boat, swim, or access the waters within fifty (50) feet of the low head dam when warning signs are present.
(b) Notwithstanding subsection (a), a person who is performing:
(1) an assessment, inspection, or maintenance on or removal of a low head dam with the written permission of the owner; or
(2) duties of the department;
is exempt from this section.