661—28.1 (80) Reports of marijuana. Persons wishing to report marijuana growing in Iowa, whether cultivated or uncultivated, may contact any local law enforcement agency within the state of Iowa or the Division of Narcotics Enforcement, Iowa Department of Public Safety, Wallace State Office Building, Des Moines, Iowa 50319. Reports may be made to the division of narcotics enforcement by telephone through the toll-free Marijuana Hotline at 1-800-532-0052.