SALT LAKE CITY (AP) — The Utah Division of Wildlife Resources has decided to enforce tougher rules on its predator control program to prevent criminal abuses and obtain better data.

The Salt Lake Tribune reports the overhaul comes after the agency found that a couple had turned in 95 coyote scalps from coyotes that were killed in Nevada by other people.

As of July 1, the agency will no longer accept scalps covered in maggots; taken from a coyote killed by someone else, including roadkills; and that are more than a year old, or are so decomposed or damaged that officials cannot confirm it came from a coyote.

To collect the bounty, participants must turn in the coyote scalp with ears attached and the lower jaw. Participants get $50 for each scalp they turn in.