Maine, most other states don't regulate hayrides, like the 1 that killed a 17-year-old girl

This December 2013 photo provided by her family shows Cassidy Charette, 17, of Oakland, Maine, who died from head injuries in an accident at a Halloween-themed hayride Saturday night, Oct. 11, 2014 in Mechanic Falls, Maine. Investigators said a mechanical problem caused a Jeep towing the wagon full of passengers she was riding in to lurch down a steep hill and slam into a tree. (AP Photo/Charette family) (The Associated Press)

Gates that lead to the Gauntlet Haunted Night Ride at Harvest Hills Farm in Mechanic Falls, Me., are open Sunday, Oct. 12, 2014, although the farm was closed after a Halloween-themed hay ride accident during the Gauntlet Haunted Night Ride crashed into a tree Saturday night, killing a teenage girl and leaving more than 20 other people injured, police said Sunday. The farm remains closed while police investigate. (AP Photo/Patrick Whittle) (The Associated Press)

Maine, like most states, doesn't have strict regulations for hayrides, including the one that lurched down a steep hill and into a tree over the weekend, killing a 17-year-old girl and injuring more than 20 others.

Authorities say a mechanical problem caused a Jeep towing a wagon full of passengers in Mechanic Falls to crash during a Halloween-themed hayride in the woods Saturday. High school student Cassidy Charette was killed.

The state fire marshal's office says Maine doesn't have statutes that regulate hayrides. A program director with the National Conference of State Legislatures says Rhode Island is the only state that appears to explicitly require a permit to operate hayrides.

South Carolina and Texas laws mention the need for permits, but there's no clear administrative regulations regarding what's required.