The main purpose of this legislation is to clarify the rules surrounding the use of pesticides in or near navigable waters in the United States. It aims to reduce regulatory burdens on farmers and pesticide users by ensuring that certain pesticide applications do not require additional permits under water pollution laws, as long as they comply with existing pesticide regulations. Key provisions of the legislation include amendments to two important laws: the Federal Insecticide, Fungicide, and Rodenticide Act and the Federal Water Pollution Control Act.