California Code
CHAPTER 2 - Obliteration of Identification Marks
Section 23900.

23900. Any person who changes, alters, removes, or obliterates the name of the maker, model, manufacturer’s number, or other mark of identification, including any distinguishing number or mark assigned by the Department of Justice, on any pistol, revolver, or any other firearm, without first having secured written permission from the department to make that change, alteration, or removal shall be punished by imprisonment pursuant to subdivision (h) of Section 1170.

(Amended by Stats. 2011, Ch. 15, Sec. 540. (AB 109) Effective April 4, 2011. Amending action operative October 1, 2011, by Sec. 636 of Ch. 15, as amended by Stats. 2011, Ch. 39, Sec. 68. Section operative January 1, 2012, pursuant to Stats. 2010, Ch. 711, Sec. 10.)