1888 Utah Laws 166, An Act to Establish a Uniform System of County Governments, ch. 50, § 19, pt. 31.

To adopt such rules and regulations within their respective counties, except within municipal corporations, with regard to the keeping and storing of every kind of gun powder, [H]ercules powder, giant powder, or other combustible material, as the safety and protection of the lives and property of individuals may require.