Under the authority of the Pesticides Act, Revised Statutes of Ontario, 1980 and Regulation 751 administered by the Ministry of the Environment, all pesticide products sold in the Province of Ontario must be classified and assigned a schedule, and subsequent marketing of each product must be in accordance with the regulations relating to the classification. Six schedules exist and are described herein. A function of the Pesticides Advisory Committee is to classify each product. The resulting classification, when published in the Ontario Gazette, becomes an amendment to the regulations under the Pesticides Act.