Indiana Code Title 36. Local Government § 36-9-2-20

(1) under the sole authority of:

(2) within the ten (10) mile area outside the municipality's boundaries under the authority of section 19 of this chapter (before its repeal).

(1) prohibit or affect a municipality's authority to exercise a power under section 9, 10, 11, 12, or 13 of this chapter with regard to a watercourse within a municipal park:

(2) void an ordinance or resolution adopted under the authority of section 9, 10, 11, 12, or 13 of this chapter with regard to a watercourse described in subdivision (1).