RCW 57 refers to the Revised Code of Washington Title 57, which governs the formation and operation of public utility districts (PUDs) in the state of Washington. These districts are created to provide essential services such as water, electricity, and sewer systems to residents and businesses in specific areas. The code outlines the procedures for establishing a PUD, including the election of commissioners and the management of district finances. It also sets regulations for service provision, ensuring that utilities are delivered efficiently and fairly to the community.