Cal. Pen. Code § 26840 : CALIFORNIA PENAL CODE — CONTROL OF DEADLY WEAPONS — FIREARMS — SALE, LEASE, OR TRANSFER OF FIREARMS — ISSUANCE, FORFEITURE, AND CONDITIONS OF LICENSE TO SELL, LEASE, OR TRANSFER FIREARMS AT RETAIL — GROUNDS FOR FORFEITURE OF LICENSE — Valid handgun safety certificate required
(a) A dealer shall not deliver a firearm unless the person receiving the firearm presents to the dealer a valid firearm safety certificate, or, in the case of a handgun, an unexpired handgun safety certificate. The firearms dealer shall retain a photocopy of the firearm safety certificate as proof of compliance with this requirement.
(b) This section shall become operative on January 1, 2015.