An Act relating to the use of heavy petroleum fuel oil as a marine fuel; relating to the duties of the Department of Environmental Conservation; and providing for an effective date.

HB 366 bans the use of high-viscosity or high-sulfur heavy petroleum fuel oil in vessel engines operating within Alaska's coastal waters, directly affecting commercial and recreational vessel operators in those areas. The bill includes exemptions for ocean voyages through coastal waters without entering state ports (if continuous and expeditious), emergencies, or distress situations requiring assistance. Violations would be subject to fines established by the Department of Environmental Conservation through regulations. The law defines "applicable waters" per federal standards and specifies "heavy petroleum fuel oil" as fuel exceeding 380 centistokes viscosity or 0.1% sulfur content.