CA Health & Safety Code Section 12091

Blasting caps or similar primary explosive initiation devices shall not be transported upon any vehicle equipped with a radio transmitter or other device which may cause detonation of such primary initiators unless such blasting caps or similar primary explosive initiation devices have been tested and proved safe for transportation by laboratory approved by the State Fire Marshal and there is affixed to the shipping container of such devices a label which states all of the following:

(a)

The type of primary explosive initiation devices in the container.

(b)

That such devices have been tested and proved safe for transportation upon any vehicle equipped with a radio transmitter or other device which may cause detonation of such primary initiators by a laboratory approved by the State Fire Marshal.