The proposed bill aims to mitigate the environmental impacts of ocean-going vessels operating near Washington by mandating the use of low-sulfur fuels. Starting January 1, 2028, vessels operating in regulated waters must not exceed a maximum sulfur content of 0.1 percent in their fuel. The bill outlines specific definitions related to vessel types, fuel specifications, and operational requirements, including record-keeping for fuel usage and switching procedures. It also establishes penalties for non-compliance, with civil penalties set at $10,000 per day for each violation, and allows for the collection of noncompliance fees under certain conditions.

Additionally, the bill creates a new chapter in Title 70A RCW, which includes provisions for the Department of Ecology to adopt rules for implementation and to establish a vessel sulfur pollution account for managing collected fees. The legislation emphasizes the importance of protecting public health and the environment by reducing harmful emissions from marine vessels, while also providing mechanisms for compliance and enforcement. The act is officially titled the "Salish Sea Protection and Marine Clean Fuels Act."