The bill establishes a new requirement for public buildings in Washington to provide baby diaper changing stations in restrooms. Specifically, it mandates that at least one restroom accessible to women and one accessible to men, or one gender-neutral restroom, must include a changing station. If multiple restrooms are available, those without a changing station must display clear signage indicating the location of the nearest station. This requirement applies to newly constructed public buildings and existing buildings 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," clarifying the scope of the legislation.