• Nonmotorized Advisory Workgroup (NAW) The purpose of the Nonmotorized Advisory Workgroup (NAW) is to assist the Michigan Snowmobile and Trails Advisory Council (MSTAC) in performing the duties and responsibilities of the MSTAC and to provide the Department of Natural Resources and Environment (DNRE) advice related to the nonmotorized program. This includes advice related to the creation, development, operation, and maintenance of the nonmotorized trail system.