California Code, Penal Code - PEN § 11108.9

Each local law enforcement agency shall develop, in conjunction with and subject to the approval of the Department of Justice, a succinct Serial Number Restoration Plan setting forth the goals for reduction in the number of recovered firearms that cannot be traced due to obliterated serial numbers, and the methods that the local agency will follow in order to achieve these goals, including, but not limited to, establishing local programs for restoring serial numbers and accessing resources of the Department of Justice or the federal Bureau of Alcohol, Tobacco, Firearms and Explosives for restoring serial numbers. These plans shall be submitted to the Department of Justice by January 1, 2000.