“R.S.23:4-46
“…a person permitted by the Division of Fish and Wildlife may use a certified tracking dog on a lead to search for and recover deer lost by a hunter during any hunting season for deer.””
State Regulations: http://www.state.nj.us/dep/fgw/
United States:
Canada:
Green — Tracking allowed
Red — No Tracking allowed
Gray — Tracking allowed under certain circumstances or in certain areas of the state/province, but not all