sentences:  Direct injection two-stroke engines made since 1989, however, are permitted on the state's waterways with some non-emission standard exceptions.California Division of Boating and Waterways' Aquatic Pest Control Program has since 1982 targeted to control water hyacinth from state waters.A native of the Amazon River in South America, the water hyacinth was introduced to the Sacramento-San Joaquin River Delta in the early 20th century.