The bill establishes new requirements for public buildings in Washington State regarding the installation of baby diaper changing stations. It mandates that any public building with a restroom must provide a changing station in at least one restroom accessible to women and one accessible to men, or in a gender-neutral restroom. If multiple restrooms exist, those without a changing station must display clear signage indicating the location of the nearest station. These requirements apply to new public buildings and existing ones undergoing significant renovations costing $15,000 or more, with certain exceptions for feasibility and specific health care facilities.

Additionally, the bill outlines penalties for non-compliance, starting with a warning letter for the first violation. Subsequent violations can result in a class 2 civil infraction, unless the changing station was removed in accordance with the established standards. The bill also defines key terms such as "baby diaper changing station," "gender-neutral restroom," and "public building," ensuring clarity in its implementation.