Carry Firarm on ATV

Here is the statute you were looking for. I posted the sections pertaining to firearms. Let me know if you need anything further.

IC 14-16-1-23
Restrictions on operation; exceptions
Sec. 23. (a) An individual shall not operate a vehicle under any of the following conditions:
(9) While transporting on or in the vehicle a firearm, unless the firearm is:
(A) unloaded; and
(B) securely encased or equipped with and made inoperative by a manufactured keylocked trigger housing mechanism.

(b) Subsection (a)(9) does not apply to a person who is carrying a firearm:
(1) if:
(A) the firearm is a handgun; and
(B) the person has been issued an unlimited handgun license to carry a handgun under IC 35-47-2;
(2) if:
(A) the firearm is a handgun; and
(B) the person is not required to possess a license to carry a handgun under IC 35-47-2-2; or
(3) if the person carrying the firearm is operating the vehicle on property that the person:
(A) owns;
(B) has a contractual interest in;
(C) otherwise legally possesses; or
(D) has permission from a person described in clauses (A) through (C) to possess a firearm on.