RCW 53 refers to the Revised Code of Washington Title 53, which governs public port districts in the state of Washington. This legislation outlines the formation, powers, and responsibilities of port districts, including their ability to manage transportation, trade, and economic development activities. The code provides guidelines for the governance of port districts, including the election of commissioners and the management of public funds. It also addresses issues such as land use, environmental regulations, and the promotion of commerce, ensuring that port districts operate effectively to support local economies and communities.