<human>:  What are the laws and regulations pertaining to owning a firearm in California?
<bot>: In California, in order to purchase or transfer a firearm, an individual must have a Firearm Safety Certificate (FSC). It is also illegal to purchase or possess a firearm if the individual is under the age of 18 (or 21 for handguns), is a convicted felon, is a prohibited person as defined by California or Federal Law, or has been adjudicated by a court of having serious mental illness. All firearms must also be registered with the Department of Justice, and additional restrictions may apply based on local or county ordinances. Further, when transporting a firearm, the firearm must be unloaded and either in a locked container or disabled with a firearm safety device, and ammunition must be stored separately.