Quantities in excess of twenty (20) pounds (but not exceeding fifty (50) pounds) of smokeless powder, or not more than five (5) pounds of black sporting powder (or any combination thereof) may be transported in a private passenger vehicle when approved by the "Chief" having jurisdiction, provided however, that such powder shall be transported in separate portable magazines having wooden walls of at least one (1) inch nominal thickness.
Cal. Code Regs. Tit. 19, § 1574.2