1907 Wash. Sess. Laws 634-636, An Act Relating to Cities of the Second Class and Providing for the Government of Such Cities . . . , ch. 241, § 29, pt. 21.
Powers of Council Enumerated. The city council of such city shall have power and authority: . . . 21. Combustibles; To regulate or prohibit the loading or storage of gunpowder and combustible or explosive materials in the city, or transporting the same through its streets or over its waters.