Cal. Penal Code § 23640
(a)
(1) The packaging of any firearm and any descriptive materials that accompany any firearm sold or transferred in this state, or delivered for sale in this state, by any licensed manufacturer or licensed dealer, shall bear a label containing the following warning statement:
WARNING
Firearms must be handled responsibly and securely stored to prevent access by children and other unauthorized users. California has strict laws pertaining to firearms, and you may be fined or imprisoned if you fail to comply with them. Visit the website of the California Attorney General at https://oag.ca.gov/firearms for information on firearm laws applicable to you and how you can comply.
Prevent child access by always keeping guns locked away and unloaded when not in use. If you keep a loaded firearm where a child obtains and improperly uses it, you may be fined or sent to prison.
If you or someone you know is contemplating suicide, please call the national suicide prevention lifeline at 1-800-273-TALK (8255).
(c) The warning statement required under subdivisions (a) and (b) shall satisfy both of the following requirements: